UMDCTF 2021 - Testudo's Message | Steg
Testudo’s Message
My friend Testudo keeps sending me this picture and I don’t know what he is trying to tell me. Can you figure out what he is saying?
You will have to wrap what you find in this challenge with UMDCTF-{} yourself before submitting
Given image:
Solution
There are only red lines and white lines. This picture is screaming “binary” to me. However, this seems to be a 7 bit binary rather than the usual 8 bit because there are only seven lines in a tile.
Just know that this is a 7 bit binary isn’t enough. You will still need to guess the order correctly. When I unscrambled the characters a bit, I know there is going to be “shell” in leet speak, so I tried to find the path that would lead to shell and try to find the full path from there.
Flag: UMDCTF-{h!dd3n-$h3lls}