Malicious Bring-Your-Own-Vulnerable-Driver Load for EDR Killing

ATT&CK techniques

Persistence → Priv Esc

Recon
Resource Dev
Initial Access
Execution
Persistence
- T1543.003Windows Service
Priv Esc
- T1543.003Windows Service
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects loading of vulnerable signed drivers abused by EDR-killer tooling including BdApiUtil.sys, TfSysMon.sys, K7RKScan.sys, ThrottleStop.sys and HwRwDrv.sys. Attackers load these drivers to gain kernel primitives for terminating security processes via DeviceIoControl, so their presence signals an imminent defense-disabling attempt.

Reporting behind it

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EAP Service Activation by Liontail Framework for DLL Sideloading - Via Command (via process_creation)

Malicious Bring-Your-Own-Vulnerable-Driver Load for EDR Killing

Pivot detection · T1685 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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