Foobar CTF 2021 - Render | Steg

01 Apr 2021

Render

My friend AFKAP send me a latest rendered song but i think it has some issues can you please do some basic checks before he release the song

Downloadable file: chall.wav

Solution

I will be using a tool called Audacity to analyze and decode the audio. After listening to the song, a segment of it is out of place as it contains machinery sound, so I googled common ways of audio steganography and I was able to find the solution.

This is in waveform.

After changing it to spectrogram, I was able to retrieve the flag: GLUG:{5p37rum_fun_101}