Bach_guitar.rar

A text file named flag.txt extracted from the image.

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 .

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

g., HackTheBox, PicoCTF, or a private lab) to give you the exact flag?

Check for DTMF tones (phone keypad sounds) that might represent a code. The flag is usually hidden in one of three ways: A text file named flag

Text appearing as "waves" in the audio spectrum.

Attempt to extract the archive. Many versions of this challenge are password-protected. Open the file in Audacity

Switch the view to . The flag is often written visually in the higher frequencies of the audio track.