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Windows Registry: AllowAnonymousCallback Enabled for Anonymous Remote Connection

Alerts on setting AllowAnonymousCallback to 0x00000001 in the CIMOM key, enabling anonymous remote connections.

FreeReviewedSigma · Medium · v1
Product
windows
Category
registry_set
Author
X__Junior (Nextron Systems) (SigmaHQ), DRL 1.1
Published
2023-11-03
Updated
2026-07-30
AnalysisDetection

ATT&CK techniques

  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 flags when the registry value "AllowAnonymousCallback" under \Microsoft\WBEM\CIMOM is set to DWORD 0x00000001. Enabling it allows remote connections between computers that do not have a trust relationship, which can broaden remote management exposure. The detection relies on telemetry for registry set events capturing TargetObject and Details.

Reporting behind it

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Windows Registry: AllowAnonymousCallback Enabled for Anonymous Remote Connection
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.