I strings the picture and in there was this hidden flag.wav. now how do i extract it any idea?
Who hides CTF Challenge flag in an audio file? To open a .wav file use this https://www.lifewire.com/wav-wave-files-2622395
I think that you need to change type of this file and open it in a usual mode, gedit, nano, vi …
Firstly analyse this file see witch type it really is.
you can extract that file using the foremost tool or binwalk tool in linux.