{"id":"9e02c8ec-02b9-43e8-81eb-34a475ba7965","title":"Network Connection Initiated To BTunnels Domains","description":"Detects network connections to BTunnels domains initiated by a process on the system.\nAttackers can abuse that feature to establish a reverse shell or persistence on a machine.\n","author":"Kamran Saifullah","status":"test","level":"medium","date":"2024-09-13","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 BTunnels will also trigger this."],"references":["https://defr0ggy.github.io/research/Utilizing-BTunnel-For-Data-Exfiltration/"],"source_path":"rules/windows/network_connection/net_connection_win_domain_btunnels.yml","source_sha256":"69d76c9e8143e1abed93e7242f548e2b5658769a24bfb6bdd607d3af050e1d9b","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/network_connection/net_connection_win_domain_btunnels.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 BTunnels Domains\nid: 9e02c8ec-02b9-43e8-81eb-34a475ba7965\nstatus: test\ndescription: |\n    Detects network connections to BTunnels domains initiated by a process on the system.\n    Attackers can abuse that feature to establish a reverse shell or persistence on a machine.\nreferences:\n    - https://defr0ggy.github.io/research/Utilizing-BTunnel-For-Data-Exfiltration/\nauthor: Kamran Saifullah\ndate: 2024-09-13\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: '.btunnel.co.in'\n    condition: selection\nfalsepositives:\n    - Legitimate use of BTunnels 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/9e02c8ec-02b9-43e8-81eb-34a475ba7965.json","kind":"sigma"}