Bypass Record
BYOVD (Vulnerable Driver) × Zemana AntiLogger v2.74.204.664
A publicly-reported instance of BYOVD (Vulnerable Driver) bypassing Zemana AntiLogger v2.74.204.664, recorded with its original source. Factual record; no assessment of any specific deployment.
Mechanism
The kernel drivers fail to verify caller privileges or target process ownership when handling IOCTL 0x80002048. A local attacker opens a handle to the driver and sends a request specifying a target process ID, causing the driver to terminate that process without authorization checks.
Detection & mitigation
Monitor for loading of known vulnerable drivers (e.g., zam64.sys, zamguard64.sys) via Sysmon Event ID 6 (driver loaded) or EDR telemetry, and block their execution using WDAC or driver block rules. Investigate any unexpected process termination events (Windows Event ID 4689) correlated with driver load events.
This is a record of a publicly-reported event, not an assessment of any specific organization's deployment. Detection and mitigation notes are drawn from the cited source. Where the source is silent, fields are omitted.