Categories
Forensics Houseplant CTF 2020

“Ezoterik”

Step 1: Waste half an hour transcribing the BF code in the image. Step 2: Discard it all. If you run strings ezoterik.jpg or inspect the image in a hex editor, you will see a suspicious ASCII string at the end: 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 For no reason whatsoever besides the fact that it’s in CyberChef, you try […]

Categories
Cryptography Houseplant CTF 2020

“…. .- .-.. ..-.”

I am extremely surprised this was the hardest challenge. The title is morse code for the word “half”, which makes you think of fractions and morse, in other words the Fractionated Morse Code cipher. Even if you haven’t heard of it, searching “half morse” on Google gives you the same result. Decrypting it using a […]