BYOVD Attacks Exploit Vulnerable Drivers to Disable Security Tools

EDR-killer malware campaigns are increasingly using bring-your-own-vulnerable-driver (BYOVD) techniques to disable endpoint detection and response solutions by exploiting legitimate but vulnerable drivers. These attacks abuse signed, legitimate drivers with known vulnerabilities to gain kernel-level access and disable security controls. The expanding ecosystem of these attacks demonstrates how attackers weaponize trusted software components to evade detection. Organizations must strengthen their driver management and monitoring capabilities to defend against these sophisticated evasion techniques.

Tactical Insight

Immediate actions

Implement driver allowlisting policies to prevent unauthorized driver installations
Enable advanced logging for driver loading events and kernel-level activities
Deploy behavioral analysis tools that can detect EDR tampering attempts

Configuration hardening

Configure systems to block known vulnerable drivers using threat intelligence feeds
Enable Windows Driver Signature Enforcement and similar protections on all endpoints
Implement application control policies that restrict driver installation privileges

Detection measures

Monitor for suspicious driver loading patterns and unsigned or revoked driver certificates
Establish baseline monitoring for EDR agent health and alert on unexpected service terminations
Deploy multiple layers of endpoint protection to ensure redundancy if one solution is disabled