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yara-rule-authoring

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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.

When to use

• Writing new YARA-X rules for malware detection
• Reviewing existing rules for quality or performance issues
• Optimizing slow-running rulesets
• Converting IOCs or threat intel into detection signatures
• Debugging false positive issues
• Preparing rules for production deployment
• Migrating legacy YARA rules to YARA-X
• Analyzing Chrome extensions (crx module) or Android apps (dex module)

When not to use

• Static analysis requiring disassembly → use Ghidra/IDA skills
• Dynamic malware analysis → use sandbox analysis skills
• Network-based detection → use Suricata/Snort skills
• Memory forensics with Volatility → use memory forensics skills
• Simple hash-based detection → just use hash lists

Skill page

Source