{"id":"0d18728b-f5bf-4381-9dcf-915539fff6c2","title":"Suspicious Cobalt Strike DNS Beaconing - DNS Client","description":"Detects a program that invoked suspicious DNS queries known from Cobalt Strike beacons","author":"Nasreddine Bencherchali (Nextron Systems)","status":"test","level":"critical","date":"2023-01-16","modified":"","tags":["attack.t1071.004","attack.command-and-control"],"technique_ids":["T1071.004"],"logsource":{"product":"windows","service":"dns-client","definition":"Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events."},"falsepositives":["Unknown"],"references":["https://www.icebrg.io/blog/footprints-of-fin7-tracking-actor-patterns","https://www.sekoia.io/en/hunting-and-detecting-cobalt-strike/"],"source_path":"rules/windows/builtin/dns_client/win_dns_client_mal_cobaltstrike.yml","source_sha256":"812ece491176d04008f5df19b0c73586f69180f71b524f1355185bfd369f8735","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/dns_client/win_dns_client_mal_cobaltstrike.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Suspicious Cobalt Strike DNS Beaconing - DNS Client\nid: 0d18728b-f5bf-4381-9dcf-915539fff6c2\nrelated:\n    - id: f356a9c4-effd-4608-bbf8-408afd5cd006\n      type: similar\nstatus: test\ndescription: Detects a program that invoked suspicious DNS queries known from Cobalt Strike beacons\nreferences:\n    - https://www.icebrg.io/blog/footprints-of-fin7-tracking-actor-patterns\n    - https://www.sekoia.io/en/hunting-and-detecting-cobalt-strike/\nauthor: Nasreddine Bencherchali (Nextron Systems)\ndate: 2023-01-16\ntags:\n    - attack.t1071.004\n    - attack.command-and-control\nlogsource:\n    product: windows\n    service: dns-client\n    definition: 'Requirements: Microsoft-Windows-DNS Client Events/Operational Event Log must be enabled/collected in order to receive the events.'\ndetection:\n    selection_eid:\n        EventID: 3008\n    selection_query_1:\n        QueryName|startswith:\n            - 'aaa.stage.'\n            - 'post.1'\n    selection_query_2:\n        QueryName|contains: '.stage.123456.'\n    condition: selection_eid and 1 of selection_query_*\nfalsepositives:\n    - Unknown\nlevel: critical\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1071.004","id":"T1071.004","name":"DNS","page":"techniques/enterprise/T1071.004/"}],"data_path":"data/detection-rules/0d18728b-f5bf-4381-9dcf-915539fff6c2.json","kind":"sigma"}