Break It | Sept 16, 2022

Introduction

Welcome to my another writeup! In this TryHackMe Break It room, there are tons of stuff that’s worth learning! Without further ado, let’s dive in.

Background

Can you break the code?

Difficulty: Medium

This challenge requires the basic knowledge of base decoding/encoding.

Overall difficulty for me: Medium

Task 1 - Bases

[Super easy] MVQXG6K7MJQXGZJTGI======

It’s a base32 encoded string. We can use base32 to decode that:

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "MVQXG6K7MJQXGZJTGI======" | base32 -d
easy_base32

[Easy] TVJYWEtZVE1NVlBXRVlMVE1WWlE9PT09

It seems to me that this is a base64 encoded string. We can use base64 to decode this:

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "TVJYWEtZVE1NVlBXRVlMVE1WWlE9PT09" | base64 -d 
MRXXKYTMMVPWEYLTMVZQ====

Double encoded? Another base32. We can pipe (|) the base64 decoded output to base32:

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "TVJYWEtZVE1NVlBXRVlMVE1WWlE9PT09" | base64 -d | base32 -d
double_bases

[Moderate] GM4HOU3VHBAW6OKNJJFW6SS2IZ3VAMTYORFDMUC2G44EQULIJI3WIVRUMNCWI6KGK5XEKZDTN5YU2RT2MR3E45KKI5TXSOJTKZJTC4KRKFDWKZTZOF3TORJTGZTXGNKCOE======

It’s a base32 encoded string.

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "GM4HOU3VHBAW6OKNJJFW6SS2IZ3VAMTYORFDMUC2G44EQULIJI3WIVRUMNCWI6KGK5XEKZDTN5YU2RT2MR3E45KKI5TXSOJTKZJTC4KRKFDWKZTZOF3TORJTGZTXGNKCOE======" | base32 -d            
38wSu8Ao9MJKoJZFwP2xtJ6PZ78HQhJ7dV4cEdyFWnEdsoqMFzdvNuJGgy93VS1qQQGefyqw7E36gs5Bq

We got a base58 string.

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "GM4HOU3VHBAW6OKNJJFW6SS2IZ3VAMTYORFDMUC2G44EQULIJI3WIVRUMNCWI6KGK5XEKZDTN5YU2RT2MR3E45KKI5TXSOJTKZJTC4KRKFDWKZTZOF3TORJTGZTXGNKCOE======" | base32 -d | base58 -d
59 6d 46 7a 5a 54 45 32 58 32 6c 7a 58 32 68 6c 65 41 3d 3d    

This time we got a hexadecimal string. We can use xxd to convert to string:

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "GM4HOU3VHBAW6OKNJJFW6SS2IZ3VAMTYORFDMUC2G44EQULIJI3WIVRUMNCWI6KGK5XEKZDTN5YU2RT2MR3E45KKI5TXSOJTKZJTC4KRKFDWKZTZOF3TORJTGZTXGNKCOE======" | base32 -d | base58 -d | xxd -r -p
YmFzZTE2X2lzX2hleA==

base64 again.

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "GM4HOU3VHBAW6OKNJJFW6SS2IZ3VAMTYORFDMUC2G44EQULIJI3WIVRUMNCWI6KGK5XEKZDTN5YU2RT2MR3E45KKI5TXSOJTKZJTC4KRKFDWKZTZOF3TORJTGZTXGNKCOE======" | base32 -d | base58 -d | xxd -r -p | base64 -d   
base16_is_hex

Got it!

[Hard] HRBUGQDUHFWDIXKUIBWXIJTHIE3DCY3BIE2FKQSZHNDE6MRUIA2TWWDMHRBV2ZKCHQWFCTLPIE2EEJDBIBZCEW3OHUSTOLRCHNFGMVC6IFJXIQ2AHVMVONSBHVOVIM2MHVPV42J4HQVCQ4REIFHVIJ2WHFWDYQSUHROGILJCIFIU23CXHNCEIXK2HRDVSXKOHV2SQJLC

For the sake of simplicity, I’ll use CyberChef to decode that:

Output: that_is_a_lot_of_bases

[Insane] 

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

Again, copy and paste it to CyberChef:

Ahh… CyberChef Magic recipe won’t do it. Let’s do it manually:

First, It’s a base32 string.

This looks like a base85 string, as it has much more special characters.

This time it’s a base10 string. Counting from 1 to 10:

This is a hexadecimal string, or base16:

Maybe it’s a base91? I’ll use dcode.fr to decode that:

This looks like base58:

hexadecimal:

base64:

base10:

hexadecimal:

Finally got that right!

Task 2 - Base and cipher

How about mixing both base and cipher?

[Easy] PJXHQ4S7GEZV6ZTDOZQQ====

A base32 string.

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "PJXHQ4S7GEZV6ZTDOZQQ====" | base32 -d
znxr_13_fcva

rot13??

[Moderate] NjZMKVhATl1EcEI2Jio4Q0xuVy1EZSo5ZkFLV0M6QVUtPFpGQ0InIkReYg==

A base64 string.

base85:

Maybe vigenre cipher?

[Hard] -!r/X,]n/Z-Zs\X,X$,rI<@]#-9Oh,-=A]R-p9\+

A base85 string:

Maybe base91? Or it just being rotated?

base64:

base32:

Looks like it being rotated:

[Insane]
GZXSMPKXH4RGE4TKGQSVKYS3HJEUCXDMGJPDAXCSIE2SGQSIIFIWQRJZGBUUGKJJFU4T24DJIFISQSZSFY4VKMKUGZXSI2DLHRRTSXLKGQSVKYS3HUSG4LJQGFCW4OCOIE2SIZTAGQSSCJLFGBUUGKJJFU4T4J3NFNOUGM2BFY4VKMKUGZXSMPKXH4RGE4TKGQSVKYS3HNQVMXRMGEVFGL2NIE2SIIKMIFIWOQTRGBUUGKJJFU4T4J3NIMXWMSJGFY4VKMKUGZXSMPKXFURTKNJVGQSVKYS3HNQVMXRMGFQTIQKPIE2SGQSIIFIWQRJZGBUUGKJJFU4T24DJIFISQTRTFY4VKMKUGZXSMPKXFURTKNJVGQSVKYS3HNQVMXRMGFCW4OCOIE2SGLKDIFIWQY2FGBUUGKJJFU4T4XRKFNOUGKR6FY4VKMKUGRNCIX2SH4RGE4TKGQSVKYS3HUSG4LJQGBSDQJSMIE2SGQSIIFIWSQKRGBUUGKJJFU4T4URGFNOUGM2BFY4VKMKUGZXSI3CKIQXTU4JJGQSVKYS3IA3SURS6GFQTIQKPIE2SIZTAIFIWQRJZGBUUGKJJFU4T4XRKFNOUGM2BFY4VKMKUGRNCGNLGHRRTSXLKGQSVKYS3HUSG4LJQGFQTIQKPIE2SGLKDIFIWSU2ZGBUUGKJJFU4T24DJIFISQSZSFY4VKMKUHRES6NZNH4RGE4TKGQSVKYS3HUSG4LJQGFQTIQKPIE2SGLKDGRCWAZRHGBUUGKJJFU4T4J3NFNOUGKR6FY4VKMKUHRES2Y2OHRRTSXLKGQSVKYS3HJEUCXDMGJPDAXCSIE2SIIKMIFIWOQTRGBUUGKJJFU4T4J3NFNOUKXBSFY4VKMKUHRES2Y2OHRRTSXLKGQSVKYS3IA3SURS6GFCW4OCOIE2SIIKMIFIWQRJZGBUUGKJJFU4T24DJFNOUKXBSFY4VKMKUGZXSI2DLHRRTSXLKGQSVKYS3IFHUC2TCGFCW4OCOIE2SIIKMGRCWEUSYGBUUGKJJFU4T24DJIFISQTRTFY4VKMKUGRNCIX2SIBYW2X3SGQSVKYS3HUSG4LJQJA3E6ZKAIE2SIIKMGQSSCJLFGBUUGKJJFU4T4URGIMXWMSJGFY4VKMKUGRNCGNLGHRRTSXLKGQSVKYS3HJET6ORII5YDIXB7IE2SGQSIIFIWOQTRGBUUGKJJFU4T24DJFNOUGKR6FY4VKMKUHRES6NZNH4RGE4TKGQSVKYS3IA3SSMR2GITU6SSQIE2SIIKMIFIWSQKRGBUUGKJJFU4T24DJIFISQSZSFY4VKMKUGZXSMPKXGQUUQXKNGQSVKYS3HUSG4LJQGFCW4OCOIE2SIZTAIFIWQRJZGBUUGKJJFU4T4URGGZZFUKLIFY4VKMKUGRNCIX2SH4RGE4TKGQSVKYS3HJET6ORII5YDIXB7IE2SGQSIIFIWSQKRGBUUGKJJFU4T4XRKFNOUGLJ7FY4VKMKUGRNCIX2SIBYW2X3SGQSVKYS3HJET6ORII5YDIXB7IE2SIZTAIFIWSU2ZGBUUGKJJFU4T4XRKIFISQRKP

A base32 string:

base85:

base91:

base10:

hexadecimal:

base64:

vigenere cipher (key = tangodown):

But that’s not the correct string. Let’s go back.

base58:

Decrypt it via vigenere decode:

Got it!!

Task 3 - Base, cipher, bit shift

Can you decode the combination? Maybe Hex workshop can help you out.

Let’s use Hex workshop!

[Moderate] 2D 37 2B 19 31 99 31 B3 B2 AB A5 18 32 37 20 B3 B2 AC 2D 1A 31 B4 A1 3A A4 A3 9C B4 AD 36 AC 9E

Fire up Hex Workshop, Create a new file by clicking “File” -> “New”:

Click “Paste Special” -> check “Interpet as a hexadecimal string” -> choose “CF_TEXT” -> click “paste”:

Block shift left:

Select “Block Shift Left” via “Tools” -> “Operations” -> “Block Shift Left”:

base64:

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "ZnV2c2cgeWJ0dnAgeXZ4ciBuIG9iZmY=" | base64 -d                
fuvsg ybtvp yvxr n obff

rot13:

[Hard] 19 1A 1C 99 1C 9C A8 38 27 B2 34 27 B9 27 26 28 3C 3B AA 28 A5 AA 2A 29 3C 29 B2 B2 21 B1 AC A6 1C AC 29 A8 38 99 2C

Copy and speical paste into Hex Workshop:

Shift left:

Choose “8 Bit Unsigned Byte”:

base58:

rot13:

[Insane] A9 A8 2B EE 2A AA C9 C8 C9 AA A8 0F 2A 8A AA EE A9 8A CA A8 A9 4F 6D 46 E9 A8 A8 0F A9 8A 6D 86 A9 AA A9 26 2A 8A 48 E8

Copy and special paste into Hex Workshop:

Rotate left:

Select “Rotate Left” via “Tools” -> “Operations” -> “Rotate Left”:

Choose “8 Bit Unsigned Byte”:

Rotate left:

base64:

┌──(root🌸siunam)-[~/ctf/thm/ctf/Break_it]
└─# echo "MEYwQUNFNUExQTUwMTVEMzk2OEExMTk4MUM1QTBG" | base64 -d        
0F0ACE5A1A5015D3968A11981C5A0F

Copy and specical paste to Hex Workshop:

Block shift left twice:

base85:

rot13:

Finally got it!

Conclusion

What we’ve learned:

Base Encoding & Decoding
Cipher
Bit Shift