bulk_extractor
bulk_extractor scans disk images or files and extracts features such as email addresses, URLs and credit-card-like numbers without parsing the file system.
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
- Quickly find email addresses and URLs in a disk image
- Triage a large evidence set in an exercise
Key features
- Fast parallel scanning
- Feature files with histograms
- Works on raw data
Installation
Install from your distribution or build from source.
Beginner usage guide
Run it against an evidence copy into a new output directory and inspect the generated feature files.
Example commands
Run these only against your own lab or authorised targets. Placeholder addresses such as 192.0.2.x are documentation ranges.
Scan an image
bulk_extractor -o out_dir disk.img-o sets a new output directory for the feature files.
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 bulk_extractor (bulk_extractor 2.1.1) on 2026-10-27.