{"id":"778ba9a8-45e4-4b80-8e3e-34a419f0b85e","title":"TeamViewer Domain Query By Non-TeamViewer Application","description":"Detects DNS queries to a TeamViewer domain only resolved by a TeamViewer client by an image that isn't named TeamViewer (sometimes used by threat actors for obfuscation)","author":"Florian Roth (Nextron Systems)","status":"test","level":"medium","date":"2022-01-30","modified":"2023-09-18","tags":["attack.command-and-control","attack.t1219.002"],"technique_ids":["T1219.002"],"logsource":{"product":"windows","category":"dns_query"},"falsepositives":["Unknown binary names of TeamViewer","Depending on the environment the rule might require some initial tuning before usage to avoid FP with third party applications"],"references":["https://www.teamviewer.com/en-us/"],"source_path":"rules/windows/dns_query/dns_query_win_teamviewer_domain_query_by_uncommon_app.yml","source_sha256":"1091d76ecd8c5d8425b574af491bb343421243bf0efc63797999ba1154e10440","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/dns_query/dns_query_win_teamviewer_domain_query_by_uncommon_app.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: TeamViewer Domain Query By Non-TeamViewer Application\nid: 778ba9a8-45e4-4b80-8e3e-34a419f0b85e\nstatus: test\ndescription: Detects DNS queries to a TeamViewer domain only resolved by a TeamViewer client by an image that isn't named TeamViewer (sometimes used by threat actors for obfuscation)\nreferences:\n    - https://www.teamviewer.com/en-us/\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-01-30\nmodified: 2023-09-18\ntags:\n    - attack.command-and-control\n    - attack.t1219.002\nlogsource:\n    product: windows\n    category: dns_query\ndetection:\n    selection:\n        QueryName:\n            - 'taf.teamviewer.com'\n            - 'udp.ping.teamviewer.com'\n    filter_main_teamviewer:\n        # Note: To avoid evasion based on similar names. Best add full install location of TeamViewer\n        Image|contains: 'TeamViewer'\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - Unknown binary names of TeamViewer\n    - Depending on the environment the rule might require some initial tuning before usage to avoid FP with third party applications\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/778ba9a8-45e4-4b80-8e3e-34a419f0b85e.json","kind":"sigma"}