Welcome to the Sigma main rule repository. The place where detection engineers, threat hunters and all defensive security practitioners collaborate on detection rules. The repository offers more than 3000 detection rules of different type and aims to make reliable detections accessible to all at no cost.
Currently the repository offers three types of rules:
Generic Detection Rules - Are threat agnostic, their aim is to detect a behavior or an implementation of a technique or procedure that was, can or will be used by a potential threat actor.
Threat Hunting Rules - Are broader in scope and are meant to give the analyst a starting point to hunt for potential suspicious or malicious activity
Emerging Threat Rules - Are rules that cover specific threats, that are timely and relevant for certain periods of time. These threats include specific APT campaigns, exploitation of Zero-Day vulnerabilities, specific malware used during an attack,...etc.
Compliance Rules - Are rules that help you identify compliance violations based on well known security frameworks such as CIS Controls, NIST, ISO 27001,...etc.
Placeholder Rules - Are rules that get their final meaning at conversion or usage time of the rule.
Explore Sigma
To start exploring the Sigma ecosystem, please visit the official website sigmahq.io
What is Sigma
Sigma is a generic and open signature format that allows you to describe relevant log events in a straightforward manner. The rule format is very flexible, easy to write and applicable to any type of log file.
The main purpose of this project is to provide a structured form in which researchers or analysts can describe their once developed detection methods and make them shareable with others.
Sigma is for log files what Snort is for network traffic and YARA is for files.
Why Sigma
Today, everyone collects log data for analysis. People start working on their own, processing numerous white papers, blog posts and log analysis guidelines, extracting the necessary information and build their own searches and dashboard. Some of their searches and correlations are great and very useful but they lack a standardized format in which they can share their work with others.
Others provide excellent analyses, include IOCs and YARA rules to detect the malicious files and network connections, but have no way to describe a specific or generic detection method in log events. Sigma is meant to be an open standard in which such detection mechanisms can be defined, shared and collected in order to improve the detection capabilities for everyone.
🌟 Key Features
A continuously growing list of detection and hunting rules, peer reviewed by a community of professional Detection Engineers.
Vendor agnostic detection rules.
Easily shareable across communities and reports
🏗️ Rule Creation
To start writing Sigma rules please check the following getting started guide along with the sigma specification:
Please refer to the CONTRIBUTING guide for detailed instructions on how you can start contributing new rules.
📦 Rule Packages
You can download the latest rule packages from the release page and start leveraging Sigma rules today. New rules are also released on a regular basis, so check back often for the latest detections.
To integrate Sigma rules in your own toolchain or products use pySigma.
🚨 Reporting False Positives or New Rule Ideas
If you find a false positive or would like to propose a new detection rule idea but do not have the time to create one, please create a new issue on the GitHub repository by selecting one of the available templates.
💬 Community
Join the Sigma community on Discord to discuss detection engineering, ask questions, share ideas, and collaborate with other practitioners. We also use Discord for announcements such as new releases and other project updates.
Projects or Products that use or integrate Sigma rules
AlphaSOC - Leverages Sigma rules to increase coverage across all supported log sources
alterix - Converts Sigma rules to the query language of CRYPTTECH's SIEM
AttackIQ - Sigma Rules integrated in AttackIQ's platform, and SigmAIQ for Sigma rule conversion and LLM apps
Atomic Threat Coverage - Automatically maps Sigma rules to MITRE ATT&CK techniques, Atomic Red Team tests, and incident response playbooks (since December 2018)
ATR (Agent Threat Rules) - Open MIT-licensed detection rule format for AI agent security threats (prompt injection, tool poisoning, context exfiltration). Reference CLI exports ATR rules to Sigma format via atr convert sigma.
AttackRuleMap - Maps Atomic Red Team attack simulations to open-source Sigma detection rules for coverage assessment
This project would've never reached this height without the help of the hundreds of contributors. Thanks to all past and present contributors for their help.
Sigma 是一种通用的开放签名格式，用于描述日志事件中的检测模式。本仓库是主要的 Sigma 检测规则集合，收录了 3000 多条由社区编写的规则，供 SIEM 系统使用。