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Windows Registry Modification: Suppress Windows Security Center Notifications

Flags setting Notification_Suppress DWORD to 1 in Windows Defender UX policy to disable security center notifications.

FreeReviewedSigma · Medium · v1
Product
windows
Category
registry_set
Author
frack113 (SigmaHQ), DRL 1.1
Published
2022-08-19
Updated
2026-07-30
AnalysisDetection

ATT&CK techniques

Persistence → 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 identifies a registry value set to suppress Windows Defender UX security notifications by writing Notification_Suppress as a DWORD value of 0x00000001 under the UX Configuration policy path. Attackers may use notification suppression to reduce user and administrator awareness of security-related activity. The detection relies on registry set telemetry indicating the target key path and the specific DWORD value being written.

Reporting behind it

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Windows reg.exe Registry Tampering of Internal Tool and Explorer Policy Settings (T1112)
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Malicious WDigest UseLogonCredential Enabled for Cleartext Credential Theft (via registry_set)
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Windows Registry Modification: Suppress Windows Security Center Notifications
Pivot detection · T1112 · 9 related

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