Learning Outline

• 1. Rule Anatomy — meta, strings, condition sections
• 2. Text Strings — nocase, wide, ascii, fullword modifiers
• 3. Hexadecimal Strings — wildcards (??), jumps ([4], [2-6]), alternatives (90|E8)
• 4. Regular Expressions — PCRE syntax, common patterns for malware
• 5. Basic Conditions — and/or/not, any/all of them, #count, filesize
• 6. String Sets & Identifiers — $a, $b, $my_string, $s* wildcards
• 7. Your First Rule — step-by-step from concept to testing

🔗 Resources

• 📖 Official YARA Documentation — Writing Rules
• 🎥 YouTube: YARA Tutorials (search link)
• 📝 YARA-Rules GitHub — Community rule repository
• 📄 Beginner's Guide to YARA Rules (Nextron)
• 🎓 MalwareAnalysisForge — YARA Class

rule Practice {
    strings:
        $cmd = "cmd.exe" nocase
        $c = "/c"
    condition:
        $cmd and $c and filesize < 1MB
}