{"id":"e54979bd-c5f9-4d6c-967b-a04b19ac4c74","title":"Uncommon Outbound Kerberos Connection","description":"Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation.\n","author":"Ilyas Ochkov, oscd.community","status":"test","level":"medium","date":"2019-10-24","modified":"2024-03-15","tags":["attack.credential-access","attack.t1558","attack.lateral-movement","attack.t1550.003"],"technique_ids":["T1550.003","T1558"],"logsource":{"category":"network_connection","product":"windows"},"falsepositives":["Web Browsers and third party application might generate similar activity. An initial baseline is required."],"references":["https://github.com/GhostPack/Rubeus"],"source_path":"rules/windows/network_connection/net_connection_win_susp_outbound_kerberos_connection.yml","source_sha256":"04de6d48738862feb52d8a923d05d0f3795b770957cbaa10554940505074d935","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/network_connection/net_connection_win_susp_outbound_kerberos_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: Uncommon Outbound Kerberos Connection\nid: e54979bd-c5f9-4d6c-967b-a04b19ac4c74\nrelated:\n    - id: eca91c7c-9214-47b9-b4c5-cb1d7e4f2350\n      type: similar\nstatus: test\ndescription: |\n    Detects uncommon outbound network activity via Kerberos default port indicating possible lateral movement or first stage PrivEsc via delegation.\nreferences:\n    - https://github.com/GhostPack/Rubeus\nauthor: Ilyas Ochkov, oscd.community\ndate: 2019-10-24\nmodified: 2024-03-15\ntags:\n    - attack.credential-access\n    - attack.t1558\n    - attack.lateral-movement\n    - attack.t1550.003\nlogsource:\n    category: network_connection\n    product: windows\ndetection:\n    selection:\n        DestinationPort: 88\n        Initiated: 'true'\n    filter_main_lsass:\n        Image: 'C:\\Windows\\System32\\lsass.exe'\n    filter_optional_chrome:\n        Image:\n            - 'C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe'\n            - 'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe'\n    filter_optional_firefox:\n        Image:\n            - 'C:\\Program Files (x86)\\Mozilla Firefox\\firefox.exe'\n            - 'C:\\Program Files\\Mozilla Firefox\\firefox.exe'\n    filter_optional_tomcat:\n        Image|endswith: '\\tomcat\\bin\\tomcat8.exe'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - Web Browsers and third party application might generate similar activity. An initial baseline is required.\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1550.003","id":"T1550.003","name":"Pass the Ticket","page":"techniques/enterprise/T1550.003/"},{"key":"enterprise/T1558","id":"T1558","name":"Steal or Forge Kerberos Tickets","page":"techniques/enterprise/T1558/"}],"data_path":"data/detection-rules/e54979bd-c5f9-4d6c-967b-a04b19ac4c74.json","kind":"sigma"}