HackTheBox Crypto Classic, yet complicated! Challenge

Challenge By : P3t4 

Challenge Description :  Find the plaintext, the key is your flag!

Flag format : HTB{key in lowercase}

Points : 10

Author : Rehman S. Beg (HTB Profile : MrReh )

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Lets download the file and extract it content, we get ciphertext.txt file lets see what we have inside

After some google research we came to know its vigenere cipher https://www.dcode.fr/vigenere-cipher but we must know the key to decode ciphertext. Lets try to decrypt the ciphertext.

We got the plain text HELLWORLD key and at the end of decode text tells us the key is the flag.

FLAG : “HTB{helloworld}”

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