When sophisticated attackers breached our systems using techniques that bypassed million-dollar security tools, we discovered an unlikely hero: OpenSearch. This presentation reveals how we transformed from victims to victors, building a 10,000-member security community that now protects critical infrastructure across Asia.

I'll share our journey from a devastating breach to creating the largest open-source security operations center, processing 5TB of threat data daily. You'll learn how we:

- Architected a real-time threat detection platform that identified zero-day exploits
- Developed correlation rules that exposed advanced persistent threats missed by commercial solutions
- Built a collaborative defense network where competitors became allies against common threats
- Created the OpenSearch Security Framework, now deployed in 100+ organizations

This isn't just a technical success story—it's a blueprint for community-driven cybersecurity. I'll reveal hard lessons learned, including our biggest mistakes and how open collaboration succeeded where isolated defenses failed.