Sigma CLI

Sigma CLI is a package that contains the command line interface for Sigma, a generic and extensible signature format for security events. It leverages the pySigma library to handle Sigma rules, enabling users to manage rule sets, validate them, and transform them into various query languages supported by different SIEM systems and detection tools.

Use cases include converting Sigma rules into native query formats for tools like Splunk, Elasticsearch, or Sysmon, analyzing rule sets for coverage and quality, and managing pySigma plugins for backends and processing pipelines. This facilitates the creation and deployment of standardized detection logic across diverse security environments.

The tool supports checking rules for validity and best practices, listing available targets and pipelines, and providing version information, making it essential for security analysts working with open-source threat detection rules.

Sigma CLI operates using the pySigma library to parse, validate, and transform Sigma rules, which are YAML-based detection definitions. It manages rule sets through commands that interact with backends for query generation, processing pipelines for rule modification, and plugins for extensibility. Conversion targets specific SIEM query languages via configured backends, while analysis and checking leverage pySigma's validation logic for syntax, semantics, and best practices.