Malicious BYOVD Driver Signed by Revoked Certificate Load (via image_load)

PremiumReviewedSigma · High · v1
Product
windows
Category
image_load
Author
HuntRule
Published
2026-05-27
Updated
2026-08-28

ATT&CK techniques

Defense Evasion
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Persistence

  6. Priv Esc

  7. Defense Evasion

  8. Cred Access

  9. Discovery

  10. Lateral Movement

  11. Collection

  12. C2

  13. Exfiltration

  14. Impact

What it detects

This rule detects the loading of a kernel driver signed with the revoked or expired certificates reused by the AVKiller EDR killer shared across multiple ransomware operators. The driver carries a randomized name and fake CrowdStrike version information but is signed by the revoked Changsha Hengxiang or expired Fuzhou Dingxin certificates, a strong indicator of bring your own vulnerable driver abuse.

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Malicious Microsoft Defender Critical Security Components Disabled - Command (via process_creation)
Malicious Microsoft Defender Service Deactivation Attempt - Command (via process_creation)
Malicious Wdigest Authentication Enabled - Reg via Command (via process_creation)
Malicious BYOVD Driver Signed by Revoked Certificate Load (via image_load)
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.