stego

Description: Does it sound like a flag? Maybe... I don't know...

File: wiretap.wav

Solution:

Let's quickly analyze the file:

This is most common task where we have two images with black and white pixels and need to XOR them pixel by pixel. Let the white pixel be 1 and black pixel be 0. Further description is not needed. Code is attached. Flag is AZADI TOWER.

There we got a dump of UDP packets in pcap file.

This task is the most simple stego task in this ctf. We have the GIF with 8 frames, all of them have little color difference in the first 3 lines. All we need just to build differences image. After some analysis we decided that it is binary encoded ASCII text. And we decoded it.