Sigma
Sigma is a generic, vendor-neutral rule format for log detections that can be converted into queries for many SIEM products.
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
- Write a detection once and convert it for your SIEM
- Use community rules as a starting point for detection engineering
Key features
- YAML rule format
- Large public rule repository
- Converters for many backends
Installation
Browse rules in the repository and use the sigma-cli/pySigma tools to convert them.
Beginner usage guide
Pick a rule for a technique you can simulate in a lab, convert it for your SIEM and test that it fires.
Example commands
Run these only against your own lab or authorised targets. Placeholder addresses such as 192.0.2.x are documentation ranges.
Install the converter CLI
pip install sigma-cliThen use `sigma convert` with a target backend as described in the docs.
Keep learning
References
Source verification
Last reviewed: 2026-10-27
Links checked over HTTP: 2026-10-27 07:51 UTC — official: 200, docs: 200, repo: 200
Commands were written from the official documentation and have not been executed on this site; test them in your lab.