Potential Remote Desktop Connection to Non-Domain Host

Detects logons using NTLM to hosts that are potentially not part of the domain.

Detection logic

Detection requirements

Platform: Linux macOS Windows
The rule states no platform. This is derived from the ATT&CK technique it maps to.
Log source product: windows
Log source service: ntlm

Known benign triggers

Host connections not using host FQDN.
Host connections to external legitimate domains.
Host connections to valid domains, exclude these.

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Detection rules

Potential Remote Desktop Connection to Non-Domain Host

Detection logic

Detection requirements

Known benign triggers

MITRE ATT&CK mappings

From the source

Licence

Authorship

Detection rules