{"id":"ce5678bb-b9aa-4fb5-be4b-e57f686256ad","title":"Potential Remote Desktop Connection to Non-Domain Host","description":"Detects logons using NTLM to hosts that are potentially not part of the domain.","author":"James Pemberton","status":"test","level":"medium","date":"2020-05-22","modified":"2021-11-27","tags":["attack.command-and-control","attack.t1219.002"],"technique_ids":["T1219.002"],"logsource":{"product":"windows","service":"ntlm","definition":"Requires events from Microsoft-Windows-NTLM/Operational"},"falsepositives":["Host connections to valid domains, exclude these.","Host connections not using host FQDN.","Host connections to external legitimate domains."],"references":["n/a"],"source_path":"rules/windows/builtin/ntlm/win_susp_ntlm_rdp.yml","source_sha256":"8d2eea9c58998e82ba4885cb5d7114cb0eb2fbc2f70ca487c2fe61f75fb0e2ac","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/ntlm/win_susp_ntlm_rdp.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potential Remote Desktop Connection to Non-Domain Host\nid: ce5678bb-b9aa-4fb5-be4b-e57f686256ad\nstatus: test\ndescription: Detects logons using NTLM to hosts that are potentially not part of the domain.\nreferences:\n    - n/a\nauthor: James Pemberton\ndate: 2020-05-22\nmodified: 2021-11-27\ntags:\n    - attack.command-and-control\n    - attack.t1219.002\nlogsource:\n    product: windows\n    service: ntlm\n    definition: Requires events from Microsoft-Windows-NTLM/Operational\ndetection:\n    selection:\n        EventID: 8001\n        TargetName|startswith: 'TERMSRV'\n    condition: selection\nfalsepositives:\n    - Host connections to valid domains, exclude these.\n    - Host connections not using host FQDN.\n    - Host connections to external legitimate domains.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1219.002","id":"T1219.002","name":"Remote Desktop Software","page":"techniques/enterprise/T1219.002/"}],"data_path":"data/detection-rules/ce5678bb-b9aa-4fb5-be4b-e57f686256ad.json","kind":"sigma"}