{"id":"dbfc7c98-04ab-4ab7-aa94-c74d22aa7376","title":"Potentially Suspicious Malware Callback Communication - Linux","description":"Detects programs that connect to known malware callback ports based on threat intelligence reports.\n","author":"hasselj","status":"test","level":"high","date":"2024-05-10","modified":"","tags":["attack.persistence","attack.command-and-control","attack.t1571"],"technique_ids":["T1571"],"logsource":{"category":"network_connection","product":"linux"},"falsepositives":["Unknown"],"references":["https://www.mandiant.com/resources/blog/triton-actor-ttp-profile-custom-attack-tools-detections","https://www.mandiant.com/resources/blog/ukraine-and-sandworm-team","https://www.elastic.co/guide/en/security/current/potential-non-standard-port-ssh-connection.html","https://thehackernews.com/2024/01/systembc-malwares-c2-server-analysis.html","https://www.cybereason.com/blog/sliver-c2-leveraged-by-many-threat-actors"],"source_path":"rules/linux/network_connection/net_connection_lnx_susp_malware_callback_port.yml","source_sha256":"c9f351ba776e5d87ebb67227fad4b3beda6819f9ccdc2791eb5ad860d3514375","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/linux/network_connection/net_connection_lnx_susp_malware_callback_port.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Potentially Suspicious Malware Callback Communication - Linux\nid: dbfc7c98-04ab-4ab7-aa94-c74d22aa7376\nrelated:\n    - id: 4b89abaa-99fe-4232-afdd-8f9aa4d20382\n      type: derived\nstatus: test\ndescription: |\n    Detects programs that connect to known malware callback ports based on threat intelligence reports.\nreferences:\n    - https://www.mandiant.com/resources/blog/triton-actor-ttp-profile-custom-attack-tools-detections\n    - https://www.mandiant.com/resources/blog/ukraine-and-sandworm-team\n    - https://www.elastic.co/guide/en/security/current/potential-non-standard-port-ssh-connection.html\n    - https://thehackernews.com/2024/01/systembc-malwares-c2-server-analysis.html\n    - https://www.cybereason.com/blog/sliver-c2-leveraged-by-many-threat-actors\nauthor: hasselj\ndate: 2024-05-10\ntags:\n    - attack.persistence\n    - attack.command-and-control\n    - attack.t1571\nlogsource:\n    category: network_connection\n    product: linux\ndetection:\n    selection:\n        Initiated: 'true'\n        DestinationPort:\n            - 888\n            - 999\n            - 2200\n            - 2222\n            - 4000\n            - 4444\n            - 6789\n            - 8531\n            - 50501\n            - 51820\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    - Unknown\nlevel: high\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/dbfc7c98-04ab-4ab7-aa94-c74d22aa7376.json","kind":"sigma"}