Staff 30$ BTC - CTF Challenge

[2.583]

download ctf zip:
https://vave.li/CTF.zip

the zip contains 2 files a privatekey.txt and an encryption.exe which was used to encrypt the txt file.
once decrypted the privatekey.txt contains the btc private key to the address below:
https://mempool.space/address/bc1q9smdc8...amsz3ve3ry

at the time of posting it has 30$, this can change based on btc price obviously
if there is an encoding issue and the private key breaks when you decrypt it send the key you used to decrypt it via pm and if correct i'll send you the key as you still solved it

good luck

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[940]

Nice one

[300]

Good way to gain some money while you do what you like. Keep it up, nice idea.

Good Luck everyone.

[2.146]

Thank you for this CTF, had a good time solving it.

Edit, wanted to add how I did it:
My approach was simple, I deobfuscated the EXE file and copied the decryption code from it.
Since it uses many different chars in the encrypted text and also has them in wrongly decrypted text I just made it check if more than 50% are latin characters.
It didn't output that many lines so I went through them manually and found the key 10101010.

[1.235]

Thanks

[3.714]

Thank you for this CTF, had a good time solving it.

Edit, wanted to add how I did it:
My approach was simple, I deobfuscated the EXE file and copied the decryption code from it.
Since it uses many different chars in the encrypted text and also has them in wrongly decrypted text I just made it check if more than 50% are latin characters.
It didn't output that many lines so I went through them manually and found the key 10101010.

Good job.

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