{"id":"4b657234-038e-4ad5-997c-4be42340bce4","title":"Network Connection Initiated To Visual Studio Code Tunnels Domain","description":"Detects network connections to Visual Studio Code tunnel domains initiated by a process on a system. Attackers can abuse that feature to establish a reverse shell or persistence on a machine.\n","author":"Kamran Saifullah","status":"test","level":"medium","date":"2023-11-20","modified":"","tags":["attack.exfiltration","attack.command-and-control","attack.t1567","attack.t1572"],"technique_ids":["T1567","T1572"],"logsource":{"category":"network_connection","product":"windows"},"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/network_connection/net_connection_win_domain_vscode_tunnel_connection.yml","source_sha256":"031628e13dbf799dabaf5870d581666d47d50bf2082b7fc8eaeac0d384b5abdf","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/network_connection/net_connection_win_domain_vscode_tunnel_connection.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Network Connection Initiated To Visual Studio Code Tunnels Domain\nid: 4b657234-038e-4ad5-997c-4be42340bce4\nrelated:\n    - id: 9501f8e6-8e3d-48fc-a8a6-1089dd5d7ef4 # Net Connection DevTunnels\n      type: similar\n    - id: b3e6418f-7c7a-4fad-993a-93b65027a9f1 # DNS VsCode\n      type: similar\n    - id: 1cb0c6ce-3d00-44fc-ab9c-6d6d577bf20b # DNS DevTunnels\n      type: similar\nstatus: test\ndescription: |\n    Detects network connections to Visual Studio Code tunnel domains initiated by a process on a system. 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: Kamran Saifullah\ndate: 2023-11-20\ntags:\n    - attack.exfiltration\n    - attack.command-and-control\n    - attack.t1567\n    - attack.t1572\nlogsource:\n    category: network_connection\n    product: windows\ndetection:\n    selection:\n        Initiated: 'true'\n        DestinationHostname|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/T1567","id":"T1567","name":"Exfiltration Over Web Service","page":"techniques/enterprise/T1567/"},{"key":"enterprise/T1572","id":"T1572","name":"Protocol Tunneling","page":"techniques/enterprise/T1572/"}],"data_path":"data/detection-rules/4b657234-038e-4ad5-997c-4be42340bce4.json","kind":"sigma"}