{"id":"54f0434b-726f-48a1-b2aa-067df14516e4","title":"Password Protected ZIP File Opened (Suspicious Filenames)","description":"Detects the extraction of password protected ZIP archives with suspicious file names. See the filename variable for more details on which file has been opened.","author":"Florian Roth (Nextron Systems)","status":"test","level":"high","date":"2022-05-09","modified":"","tags":["attack.command-and-control","attack.stealth","attack.t1027","attack.t1105","attack.t1036"],"technique_ids":["T1027","T1036","T1105"],"logsource":{"product":"windows","service":"security"},"falsepositives":["Legitimate used of encrypted ZIP files"],"references":["https://twitter.com/sbousseaden/status/1523383197513379841"],"source_path":"rules/windows/builtin/security/win_security_susp_opened_encrypted_zip_filename.yml","source_sha256":"e64115bc39b3703e470cc0ef98f578824d4cf3a756d46606dbf7bae8ee7e1268","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/win_security_susp_opened_encrypted_zip_filename.yml","license":"Detection Rule License 1.1","license_url":"https://github.com/SigmaHQ/Detection-Rule-License/blob/main/LICENSE.Detection.Rules.md","yaml":"title: Password Protected ZIP File Opened (Suspicious Filenames)\nid: 54f0434b-726f-48a1-b2aa-067df14516e4\nstatus: test\ndescription: Detects the extraction of password protected ZIP archives with suspicious file names. See the filename variable for more details on which file has been opened.\nreferences:\n    - https://twitter.com/sbousseaden/status/1523383197513379841\nauthor: Florian Roth (Nextron Systems)\ndate: 2022-05-09\ntags:\n    - attack.command-and-control\n    - attack.stealth\n    - attack.t1027\n    - attack.t1105\n    - attack.t1036\nlogsource:\n    product: windows\n    service: security\ndetection:\n    selection:\n        EventID: 5379\n        TargetName|contains: 'Microsoft_Windows_Shell_ZipFolder:filename'\n    selection_filename:\n        TargetName|contains:\n            - 'invoice'\n            - 'new order'\n            - 'rechnung'\n            - 'factura'\n            - 'delivery'\n            - 'purchase'\n            - 'order'\n            - 'payment'\n    condition: selection and selection_filename\nfalsepositives:\n    - Legitimate used of encrypted ZIP files\nlevel: high\n","validation":"yaml_parsed_not_backend_compiled_or_live_validated","techniques":[{"key":"enterprise/T1027","id":"T1027","name":"Obfuscated Files or Information","page":"techniques/enterprise/T1027/"},{"key":"enterprise/T1036","id":"T1036","name":"Masquerading","page":"techniques/enterprise/T1036/"},{"key":"enterprise/T1105","id":"T1105","name":"Ingress Tool Transfer","page":"techniques/enterprise/T1105/"}],"data_path":"data/detection-rules/54f0434b-726f-48a1-b2aa-067df14516e4.json","kind":"sigma"}