decryption help (arg??)

[RedGajin]

working on a decryption challenge for a class, anyone else into this kinda stuff? ive put everything i have so far in this google doc:

https://docs.google.com/document/d/1608ycigaretteSrICEBXjFrCsKROHCZNDU4V1vRpRPntMEAdM/edit?usp=sharing

ive yet to do the 'wargame' on that challenge site yet, but that may reveal something idk. theres nothing else that could be a clue on the website the original crypt comes from, the text is just a paragraph in the page source and thats it.

my guess is that the water cactus line might be a key for decrypting the rest of the text, but not sure how

[Ad Bot]

[HypnoT]

Tried my best couldn't come up with anything fruitful. My guess is that the deciphered version is some kind of program or image. I tried forwards and backwards ciphers using various rotations and alterations of watercactus but yeah nothing works

[Master Matthew²]

If its base 64, and its this long, its probably an image.
http://codebeautify.org/base64-to-image-converter

[HypnoT]

If its base 64, and its this long, its probably an image.
http://codebeautify.org/base64-to-image-converter

Yeah I used this to test the most obvious variants, couldn't get anything to work. I thought it would be as easy as reversing the rotated hex, then applying an unknown level of rotations using watercactus as a key

[RedGajin]

yeah i tried converting it to an image and a few more variants today but im still getting nothing. p frustrating, ill try the blackbox challenge when i have time and see if that reveals anything. its not even hosted by the same people tho, so itd be odd if there was something there

[Ipquarx]

Okay so the base64 decoded data seems to have an alphabet of 16 characters:
0-9, N-S (NOPQRS is six, 0-9 is ten)

So it could be hex, possibly.

[HypnoT]

-deleted-

Edit: Whoops, thought I got a step  further but realised I just messed up copying pasting some stuff while playing with the code

Edit2: So I don't think it's a keyword cipher at all at this point, like Ipquarx says it's already in Base64 after a Rot13 cipher is performed. The result doesn't form an image even if reversed, the clue to blackbox level 1 I thought maybe referred to ELF but again if I decode the code forwards or backwards to ascii or utf-8 I don't get an ELF file. Blackbox level 1 was fairly easy for me, I just used objdump -s on the ELF file and in the ASCII section I could read the password for level 2 was "PassFor2". I wasn't able to solve level 2 because it requires assembly knowledge and how to use bufferoverflow to execute malicious code. At no point was anything like WaterCactus referenced so not sure how that helps.

[HypnoT]

Solved it! I figured out the WaterCactus clue

ThreeIsMeECBSymetry:BlackBoxLevel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[HypnoT]

One step further again

DrSeuss:BlackBoxLevel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

[HypnoT]

Another step along
https://pastebin.com/sptSnDuY

Next encryption method will be SERPENT

Edit: Solved: https://pastebin.com/xYzmVAtL

Edit2: Solved next one: https://pastebin.com/CQH4E3Lz
Next solution will be ARCFOUR encryption based on hint