Suspicious Security Center Health Notification Hidden via Registry

PremiumReviewedSigma · Medium · v1
Product
windows
Category
registry_set
Author
HuntRule
Published
2026-07-04
Updated
2026-08-28

ATT&CK techniques

Persistence → Defense Evasion
  1. Recon

  2. Resource Dev

  3. Initial Access

  4. Execution

  5. Priv Esc

  6. Defense Evasion

  7. Cred Access

  8. Discovery

  9. Lateral Movement

  10. Collection

  11. C2

  12. Exfiltration

  13. Impact

What it detects

This rule detects modification of the Explorer policy value that hides the Security and Maintenance health notifications which the Trigona actor set to suppress warnings while disabling protections and this matters because hiding security health alerts is a user impact evasion technique meant to keep victims unaware of a degraded security posture.

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