Flatpack-522.rar -

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

Good luck, and happy hunting!

# 4. Unpack the binary blob binwalk -e mystery.bin > /dev/null flatpack-522.rar

hidden.txt now contains:

$ zbarimg _mystery.bin.extracted/00000000.png QR-Code:HTBfl4t_p4ck_5c4nn3r_2023 That is the flag. Below is a one‑liner script that reproduces the entire process automatically. It assumes you have unrar , zsteg , binwalk , and zbarimg installed. flatpack-522.rar

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:

$ zsteg -a cover.png Output shows:

# 3. (Optional) Look for hidden data in the cover image # zsteg -a cover.png # just for curiosity