{"id":"37e4024a-6c80-4d8f-b95d-2e7e94f3a8d1","title":"Outbound Network Connection Initiated By Microsoft Dialer","description":"Detects outbound network connection initiated by Microsoft Dialer.\nThe Microsoft Dialer, also known as Phone Dialer, is a built-in utility application included in various versions of the Microsoft Windows operating system. Its primary function is to provide users with a graphical interface for managing phone calls via a modem or a phone line connected to the computer.\nThis is an outdated process in the current conext of it's usage and is a common target for info stealers for process injection, and is used to make C2 connections, common example is \"Rhadamanthys\"\n","author":"CertainlyP","status":"test","level":"high","date":"2024-04-26","modified":"","tags":["attack.execution","attack.command-and-control","attack.t1071.001"],"technique_ids":["T1071.001"],"logsource":{"category":"network_connection","product":"windows"},"falsepositives":["In Modern Windows systems, unable to see legitimate usage of this process, However, if an organization has legitimate purpose for this there can be false positives."],"references":["https://tria.ge/240301-rk34sagf5x/behavioral2","https://app.any.run/tasks/6720b85b-9c53-4a12-b1dc-73052a78477d","https://research.checkpoint.com/2023/rhadamanthys-v0-5-0-a-deep-dive-into-the-stealers-components/","https://strontic.github.io/xcyclopedia/library/dialer.exe-0B69655F912619756C704A0BF716B61F.html"],"source_path":"rules/windows/network_connection/net_connection_win_dialer_initiated_connection.yml","source_sha256":"9c13969b70c3bb98c5b6d722d491df90053e5eb685957bcc183b68e48d243f8f","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/network_connection/net_connection_win_dialer_initiated_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: Outbound Network Connection Initiated By Microsoft Dialer\nid: 37e4024a-6c80-4d8f-b95d-2e7e94f3a8d1\nstatus: test\ndescription: |\n    Detects outbound network connection initiated by Microsoft Dialer.\n    The Microsoft Dialer, also known as Phone Dialer, is a built-in utility application included in various versions of the Microsoft Windows operating system. Its primary function is to provide users with a graphical interface for managing phone calls via a modem or a phone line connected to the computer.\n    This is an outdated process in the current conext of it's usage and is a common target for info stealers for process injection, and is used to make C2 connections, common example is \"Rhadamanthys\"\nreferences:\n    - https://tria.ge/240301-rk34sagf5x/behavioral2\n    - https://app.any.run/tasks/6720b85b-9c53-4a12-b1dc-73052a78477d\n    - https://research.checkpoint.com/2023/rhadamanthys-v0-5-0-a-deep-dive-into-the-stealers-components/\n    - https://strontic.github.io/xcyclopedia/library/dialer.exe-0B69655F912619756C704A0BF716B61F.html\nauthor: CertainlyP\ndate: 2024-04-26\ntags:\n    - attack.execution\n    - attack.command-and-control\n    - attack.t1071.001\nlogsource:\n    category: network_connection\n    product: windows\ndetection:\n    selection:\n        Image|endswith: ':\\Windows\\System32\\dialer.exe'\n        Initiated: 'true'\n    filter_main_local_ranges:\n        DestinationIp|cidr:\n            - '127.0.0.0/8'\n            - '10.0.0.0/8'\n            - '172.16.0.0/12'\n            - '192.168.0.0/16'\n            - '169.254.0.0/16'\n            - '::1/128'  # IPv6 loopback\n            - 'fe80::/10'  # IPv6 link-local addresses\n            - 'fc00::/7'  # IPv6 private addresses\n    condition: selection and not 1 of filter_main_*\nfalsepositives:\n    - In Modern Windows systems, unable to see legitimate usage of this process, However, if an organization has legitimate purpose for this there can be false positives.\nlevel: high\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/37e4024a-6c80-4d8f-b95d-2e7e94f3a8d1.json","kind":"sigma"}