Pragyan CTF 2017: Give The Guy (100pts)

By: ChalmersCTF

Challenge Description :

Hacker G has a website. Can you use it to decipher this cipher text ?

Cipher text :- dobrjtuojxagbqhd

Link : http://139.59.62.216/give_the_guy/

NOTE :- Please enclose the flag in the format pragyanctf{<flag>}.

Solution:

After brute forcing the challenge, probing for hidden directories/files, it turned out that if you simply run Affine-cipher on the ciphertext, you get the flag…