Looking for a in the archive (using 7z l -slt Bach_Guitar.rar ).
Typically looks like CTF{...} or FLAG{...} . Bach_Guitar.rar
Common methods to find the password include: Looking for a in the archive (using 7z l -slt Bach_Guitar
Text appearing as "waves" in the audio spectrum. viewable in a Hex editor.
Checking the of the .rar file itself (using exiftool ).
Attempt to extract the archive. Many versions of this challenge are password-protected.
Data hidden after the "End of File" marker (EOF), viewable in a Hex editor.