{"id":"64d51a51-32a6-49f0-9f3d-17e34d640272","title":"Ngrok Usage with Remote Desktop Service","description":"Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-04-29","modified":"","tags":["attack.command-and-control","attack.t1090"],"technique_ids":["T1090"],"logsource":{"product":"windows","service":"terminalservices-localsessionmanager"},"falsepositives":["Unknown"],"references":["https://twitter.com/tekdefense/status/1519711183162556416?s=12&t=OTsHCBkQOTNs1k3USz65Zg","https://ngrok.com/"],"source_path":"rules/windows/builtin/terminalservices/win_terminalservices_rdp_ngrok.yml","source_sha256":"815692c6aad1c2feef4d71bd6e7ea0d8033c86eb8038b3c0a33e7890b1cafc5d","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/terminalservices/win_terminalservices_rdp_ngrok.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Ngrok Usage with Remote Desktop Service\nid: 64d51a51-32a6-49f0-9f3d-17e34d640272\nstatus: test\ndescription: Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour\nreferences:\n    - https://twitter.com/tekdefense/status/1519711183162556416?s=12&t=OTsHCBkQOTNs1k3USz65Zg\n    - https://ngrok.com/\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-04-29\ntags:\n    - attack.command-and-control\n    - attack.t1090\nlogsource:\n    product: windows\n    service: terminalservices-localsessionmanager\ndetection:\n    selection:\n        EventID: 21\n        Address|contains: '16777216'\n    condition: selection\nfalsepositives:\n    - Unknown\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1090","id":"T1090","name":"Proxy","page":"techniques/enterprise/T1090/"}],"data_path":"data/detection-rules/64d51a51-32a6-49f0-9f3d-17e34d640272.json","kind":"sigma"}