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Potential CertiGhost AD CS Machine Identity Mismatch (CVE-2026-54121)

Identifies successful Active Directory Certificate Services (AD CS) certificate issuance events where a machine-account requester differs from the Remote Machine Discovery (RMD) chase target while the event's DNS…

Description

Identifies successful Active Directory Certificate Services (AD CS) certificate issuance events where a machine-account requester differs from the Remote Machine Discovery (RMD) chase target while the event's DNS subject alternative name (SAN) matches that target. This requester-to-target mismatch may indicate CertiGhost (CVE-2026-54121) or similar abuse of AD CS request-context chase processing.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

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Detection requirements

Platform
ContainersIdentity ProviderLinuxmacOSWindows

The rule states no platform. This is derived from the 3 ATT&CK techniques it maps to.

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