Day 13 | Advent of Cyber 2025 | YARA Rules - YARA mean one! WalkThrough | TryHackMe

Day 13 of Advent of Cyber 2025 takes us deep into YARA rules – the powerful pattern-matching tool used by blue teams to detect malware and hidden data. In this walkthrough, I break down the challenge “YARA mean one!” and show how to craft a rule that extracts McSkidy’s encoded message.

What you’ll learn in this video:
- How YARA rules are structured (meta, strings, condition)
- Writing regex to detect Base64-encoded messages
- Using YARA to count matches and refine detections
- Practical tips for reducing false positives

This challenge highlights why YARA is a must-have skill for malware analysts and SOC defenders. Follow along to strengthen your detection skills and add another tool to your cybersecurity arsenal.

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Видео Day 13 | Advent of Cyber 2025 | YARA Rules - YARA mean one! WalkThrough | TryHackMe канала CyberXPopsy