{"id":"b3e6418f-7c7a-4fad-993a-93b65027a9f1","title":"DNS Query To Visual Studio Code Tunnels Domain","description":"Detects DNS query requests to Visual Studio Code tunnel domains. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.\n","author":"citron_ninja","status":"test","level":"medium","date":"2023-10-25","modified":"2023-11-20","tags":["attack.command-and-control","attack.t1071.001"],"technique_ids":["T1071.001"],"logsource":{"product":"windows","category":"dns_query"},"falsepositives":["Legitimate use of Visual Studio Code tunnel will also trigger this."],"references":["https://ipfyx.fr/post/visual-studio-code-tunnel/","https://badoption.eu/blog/2023/01/31/code_c2.html","https://cydefops.com/vscode-data-exfiltration"],"source_path":"rules/windows/dns_query/dns_query_win_vscode_tunnel_communication.yml","source_sha256":"33d6d7770e9a886902b97be6d98ec59b3e68c1f9c74dd59ecc2ca99510955d4a","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/dns_query/dns_query_win_vscode_tunnel_communication.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: DNS Query To Visual Studio Code Tunnels Domain\nid: b3e6418f-7c7a-4fad-993a-93b65027a9f1\nrelated:\n    - id: 9501f8e6-8e3d-48fc-a8a6-1089dd5d7ef4 # Net Connection DevTunnels\n      type: similar\n    - id: 4b657234-038e-4ad5-997c-4be42340bce4 # Net Connection VsCode\n      type: similar\n    - id: 1cb0c6ce-3d00-44fc-ab9c-6d6d577bf20b # DNS DevTunnels\n      type: similar\nstatus: test\ndescription: |\n    Detects DNS query requests to Visual Studio Code tunnel domains. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.\nreferences:\n    - https://ipfyx.fr/post/visual-studio-code-tunnel/\n    - https://badoption.eu/blog/2023/01/31/code_c2.html\n    - https://cydefops.com/vscode-data-exfiltration\nauthor: citron_ninja\ndate: 2023-10-25\nmodified: 2023-11-20\ntags:\n    - attack.command-and-control\n    - attack.t1071.001\nlogsource:\n    product: windows\n    category: dns_query\ndetection:\n    selection:\n        QueryName|endswith: '.tunnels.api.visualstudio.com'\n    condition: selection\nfalsepositives:\n    - Legitimate use of Visual Studio Code tunnel will also trigger this.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1071.001","id":"T1071.001","name":"Web Protocols","page":"techniques/enterprise/T1071.001/"}],"data_path":"data/detection-rules/b3e6418f-7c7a-4fad-993a-93b65027a9f1.json","kind":"sigma"}