Flatpack-522.rar -

Try the following candidates:

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

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

$ binwalk -e mystery.bin This creates a folder _mystery.bin.extracted containing 00000000.png . Open it: Try the following candidates: # 2

The secret lies within the binary. So the PNG is just a hint, not the flag itself. 6.1 File Type $ file mystery.bin mystery.bin: data Run binwalk to look for embedded files: flatpack-522.rar

# 1. Extract outer archive (password = 522) unrar x -p522 flatpack-522.rar

$ feh _mystery.bin.extracted/00000000.png The image is a . Decode it with zbarimg :