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Yara Rule Authoring

Skill Verified Active

Guides authoring of high-quality YARA-X detection rules for malware identification. Use when writing, reviewing, or optimizing YARA rules. Covers naming conventions, string selection, performance optimization, migration from legacy YARA, and false positive reduction. Triggers on: YARA, YARA-X, malware detection, threat hunting, IOC, signature, crx module, dex module.

Purpose

To empower users to author effective and performant YARA-X detection rules for malware identification by providing best practices, decision trees, and tool recommendations.

Features

  • Guides YARA-X rule authoring
  • Covers string selection and performance optimization
  • Details platform-specific detection strategies
  • Provides guidance on testing and validation
  • Includes linting and analysis scripts

Use Cases

  • Writing new YARA-X rules for malware
  • Reviewing and optimizing existing YARA rules
  • Migrating legacy YARA rules to YARA-X
  • Developing detection signatures for threat intelligence

Non-Goals

  • Performing dynamic malware analysis
  • Conducting network-based detection
  • Static analysis requiring disassembly
  • Simple hash-based detection

Installation

First, add the marketplace

/plugin marketplace add trailofbits/skills
/plugin install yara-authoring@trailofbits

Quality Score

Verified
98 /100
Analyzed about 12 hours ago

Trust Signals

Last commit3 days ago
Stars5.2k
LicenseCC-BY-SA-4.0
Status
View Source

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