Bach_guitar.rar

Data hidden after the "End of File" marker (EOF), viewable in a Hex editor.

Use strings to look for readable text at the end of the file. Inspect the LSB (Least Significant Bit) using zsteg . Open the file in Audacity . Bach_Guitar.rar

Check for hidden data using steghide (common password: bach ). Data hidden after the "End of File" marker

Typically looks like CTF{...} or FLAG{...} . Bach_Guitar.rar

Text appearing as "waves" in the audio spectrum.

Attempt to extract the archive. Many versions of this challenge are password-protected.