SigmaHQ/rules/windows/builtin/win_susp_ntlm_rdp.yml
2020-05-22 13:32:02 +10:00

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YAML

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