This challenge was about extracting a (not very well) hidden message out of an image file:
doge_stege Forensics (100 pts) -------------- You were startled to learn the The Plague has been behind many of the most popular internet memes. We believe he hides information in these funny pictures with steganography in order to broadcast his messages through time without detection. Find the hidden message, stop the signal.
Obvious Stego is Obvious
The first thing to do with every file you get from a CTF challenge is to run the
file command on it:
% file doge_stege.png doge_stege.png: PNG image data, 680 x 510, 8-bit colormap, non-interlaced