Bring Your Own Vulnerable Driver: How EDR Killing Became an Industry

This analysis traces how BYOVD (Bring Your Own Vulnerable Driver) EDR-killers scaled from ad-hoc tools into a supplied, industrialized capability used widely by ransomware affiliates: it documents a four-year timeline of tool sales and sharing (including FIN7, Gentlemen RaaS, Qilin, Warlock, Reynolds, Akira), named vulnerable drivers and CVEs (e.g., rwdrv.sys, hlpdrv.sys, NSecKrnl, BdApiUtil, CVE-2024-51324, CVE-2025-68947), and explains detection and mitigation approaches focused on driver-load monitoring, DeviceIoControl/IOCTL behavior, callback removal, process termination loops, and cross-telemetry correlation.