Difficulty: easy

Category: forensics

Author: xnull

Description:

### Hidden Message in Image

Someone sent you a cute cat picture, but they claim there's a secret message hidden inside it.

The image looks completely normal. Can you find what's hidden?

Solution

After downloading the image, we can run zsteg on it:

$ zsteg cat.png
b1,r,lsb,xy         .. text: "ENDLM{h1dd3n_1n_pl41n_s1ght_8a7c}"
b1,rgb,msb,xy       .. file: OpenPGP Public Key
b4,r,lsb,xy         .. file: AIX core file 64-bit, \001

Flag: ENDLM{h1dd3n_1n_pl41n_s1ght_8a7c}