Original Writeup on seall.dev

We are given a pasta.jpg:

At the end of the image file is a sequence of a/b’s (when viewed with xxd or a hex editor).

baabaaabbbaabaababbababaaaabaabaaaaaabaabaaaaaabaaaaaaaababaababaababaababababbaaaabaabbababbababaababaaaabbaaaabba

Using Dcode.fr’s Cipher Identifier it identifies it as a Bacon Cipher.

Decoding returns the flag: THEYWEREREALLLLYCOOKING

Flag: KashiCTF{THEYWEREREALLLLYCOOKING}