CTF misc-audio and video steganography

Note: Audio and video steganography is mainly for some specific music, there will be more obvious features in the process of listening or viewing, and you can get flag

(1) MP3stego

Don't be overwhelmed when you get an MP3 file, try MP3stego first

Usage: decode -X -P password mp3 file

(2) Waveform:

Generally speaking, for the waveform direction question, after observing the abnormality, use the relevant software (Audacity, Adobe Audition, etc.) to observe the waveform law, and further convert the waveform into 01 strings, etc., so as to extract and convert the final flag.

(3) Spectrum:

Spectral steganography in audio is to hide strings in the frequency spectrum. Such audio usually has a more obvious feature, which sounds like a noise or harshness.

(4) LSB audio steganography:

Similar to the LSB steganography in image steganography, there is also a corresponding LSB steganography in audio.Mainly using the Silenteye tool