Binwalk
Binwalk analyses binary files, such as firmware images, to find and extract embedded files and compressed data.
Legal & ethical use. Use this tool only on systems, networks and data that you own or have explicit written permission to test. Unauthorised access or scanning can break computer-misuse laws (for example Pakistan's Prevention of Electronic Crimes Act, 2016, and equivalents elsewhere). Practise in your own lab or in authorised environments such as CTFs.
What it is used for
- Find files hidden inside another file in a CTF
- Inspect firmware images from your own devices
Key features
- Signature scanning
- Automatic extraction (-e)
- Entropy analysis
Installation
Install from your distribution or pip/source per the repository.
Beginner usage guide
Scan first without extraction to see offsets, then extract in a sandbox directory.
Example commands
Run these only against your own lab or authorised targets. Placeholder addresses such as 192.0.2.x are documentation ranges.
Scan and extract embedded files
binwalk -e suspicious.binLists embedded signatures and extracts what it can into a *_extracted folder.
Keep learning
🚩 Practice challenge: Carve It medium
References
Source verification
Last reviewed: 2026-10-27
Links checked over HTTP: 2026-10-27 07:51 UTC — official: 200, docs: 200, repo: 200
Command flags checked against the real binary binwalk (General Error: Cannot open file --version (CWD: /home/ali/De...) on 2026-10-27.