Possible Remote Desktop Connection to Non-Domain Host (via ntlm)

title: Possible Remote Desktop Connection to Non-Domain Host (via ntlm)
id: 09f4c03c-61d2-540f-8471-aa9d32323ea2
status: stable
description: This rule detects logons using NTLM to hosts that are potentially not part of the domain.
references:
    - https://attack.mitre.org/techniques/T1219/002/
    - n/a
author: Huntrule Team
date: 2026-06-13
tags:
    - attack.command-and-control
    - attack.t1219.002
logsource:
    product: windows
    service: ntlm
    definition: Requires events from Microsoft-Windows-NTLM/Operational
detection:
    selection:
        EventID: 8001
        TargetName|startswith: 'TERMSRV'
    condition: selection
falsepositives:
    - Unknown
level: medium