Possible OMIGOD Unauthenticated OMI WSMan Command Execution via Web Request (via webserver)

ATT&CK techniques

Initial Access → Execution

Recon
Resource Dev
Initial Access
- T1190Exploit Public-Facing Application
Execution
- T1059.004Unix Shell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects HTTP POST requests to the OMI WSMan management endpoint that the OMIGOD vulnerability CVE-2021-38647 abuses to run shell commands as root without an Authorization header on Azure Linux virtual machines. Attackers use this unauthenticated remote code execution path for initial access and privilege escalation, so exposed OMI listeners on ports 5985 5986 and 1270 receiving these requests should be treated as compromise.

Reporting behind it

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Possible OMIGOD Unauthenticated OMI WSMan Command Execution via Web Request (via webserver)

Pivot detection · T1059.004 · 9 related

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

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