{"id":"6d8c3d20-a5e1-494f-8412-4571d716cf5c","title":"Communication To Uncommon Destination Ports","description":"Detects programs that connect to uncommon destination ports","author":"Florian Roth (Nextron Systems)","status":"test","level":"medium","date":"2017-03-19","modified":"2024-03-12","tags":["attack.persistence","attack.command-and-control","attack.t1571"],"technique_ids":["T1571"],"logsource":{"category":"network_connection","product":"windows"},"falsepositives":["Unknown"],"references":["https://docs.google.com/spreadsheets/d/17pSTDNpa0sf6pHeRhusvWG6rThciE8CsXTSlDUAZDyo"],"source_path":"rules/windows/network_connection/net_connection_win_susp_malware_callback_ports_uncommon.yml","source_sha256":"00317526a267ecfceb9c3f64b2f5ee68b49cecb3a2650817d256009af0d2232f","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/network_connection/net_connection_win_susp_malware_callback_ports_uncommon.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Communication To Uncommon Destination Ports\nid: 6d8c3d20-a5e1-494f-8412-4571d716cf5c\nrelated:\n    - id: 4b89abaa-99fe-4232-afdd-8f9aa4d20382\n      type: similar\nstatus: test\ndescription: Detects programs that connect to uncommon destination ports\nreferences:\n    - https://docs.google.com/spreadsheets/d/17pSTDNpa0sf6pHeRhusvWG6rThciE8CsXTSlDUAZDyo\nauthor: Florian Roth (Nextron Systems)\ndate: 2017-03-19\nmodified: 2024-03-12\ntags:\n    - attack.persistence\n    - attack.command-and-control\n    - attack.t1571\nlogsource:\n    category: network_connection\n    product: windows\ndetection:\n    selection:\n        Initiated: 'true'\n        DestinationPort:\n            - 8080\n            - 8888\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    filter_optional_sys_directories:\n        Image|startswith:\n            - 'C:\\Program Files\\'\n            - 'C:\\Program Files (x86)\\'\n    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*\nfalsepositives:\n    - Unknown\nlevel: medium\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1571","id":"T1571","name":"Non-Standard Port","page":"techniques/enterprise/T1571/"}],"data_path":"data/detection-rules/6d8c3d20-a5e1-494f-8412-4571d716cf5c.json","kind":"sigma"}