write-ups-challenges-2020-2021/stegosaurus

Stegosaurus

Description

Found this image of an amazing video game representing some city in Belgium. But I hear there's more to it, maybe you can find something?

Deployment

Just make the image available for download

Difficulty

Medium Very basic steganography but with extra steps. The it's s a matter of combining different steganography techniques.

Solution

The LSB's of the RED-values of the image represent a WAV-file. The WAV file has two channels, same thing here; extracting the LSB's from the waves from both channels and xor-ing them yields a flag.

Flag

IGCTF{That's_Quiet_a_Groovy_song}