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Cisco Talos and Trend Micro have documented that Qilin and Warlock ransomware operations are now using the Bring Your Own Vulnerable Driver (BYOVD) technique to systematically disable endpoint detection and response software before deploying ransomware payloads. The technique exploits a legitimate but outdated signed kernel driver to terminate over 300 EDR products from virtually every security vendor — including CrowdStrike, SentinelOne, Microsoft Defender for Endpoint, and Carbon Black.
Qilin's Warlock toolkit, capable of disabling over 300 security tools using Bring Your Own Vulnerable Driver techniques, is not a nation-state capability — it is an affiliate-accessible ransomware tool. EDR is a necessary control. It is not a sufficient one, and the industry's marketing has outpaced what the technology can actually guarantee.
CipherWatch Editorial
Security Intelligence Platform