itiB
36 lines
830 B
YAML
36 lines
830 B
YAML
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title: Potential Remote Desktop Connection to Non-Domain Host
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ruletype: Sigma
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author: James Pemberton
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date: 2020/05/22
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description: Detects logons using NTLM to hosts that are potentially not part of the
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domain.
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detection:
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SELECTION_1:
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EventID: 8001
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SELECTION_2:
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TargetName: TERMSRV*
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condition: (SELECTION_1 and SELECTION_2)
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falsepositives:
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- Host connections to valid domains, exclude these.
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- Host connections not using host FQDN.
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- Host connections to external legitimate domains.
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fields:
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- Computer
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- UserName
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- DomainName
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- TargetName
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id: ce5678bb-b9aa-4fb5-be4b-e57f686256ad
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level: medium
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logsource:
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definition: Requires events from Microsoft-Windows-NTLM/Operational
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product: windows
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service: ntlm
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modified: 2021/11/27
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references:
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- n/a
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status: test
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tags:
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- attack.command_and_control
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- attack.t1219
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