Flatpack-522.rar -

# 4. Unpack the binary blob binwalk -e mystery.bin > /dev/null

$ steghide extract -sf cover.png -p "" -xf hidden.txt (If steghide asks for a password, just press Enter – it’s not password protected.) flatpack-522.rar

$ display cover.png Nothing obvious appears. However, the challenge name “FlatPack” hints at “flat” data (i.e., a flat image with hidden data). Use zsteg (a popular stego tool) to search for hidden data: and happy hunting!

#!/usr/bin/env bash set -e

# 2. Extract inner archive (no password) unrar x inner.rar flatpack-522.rar

Good luck, and happy hunting!