{"id":"571498c8-908e-40b4-910b-d2369159a3da","title":"Password Protected ZIP File Opened (Email Attachment)","description":"Detects the extraction of password protected ZIP archives. 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.initial-access","attack.stealth","attack.t1027","attack.t1566.001"],"technique_ids":["T1027","T1566.001"],"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_outlook.yml","source_sha256":"387d889a49e08a74061b0e6f6a09f534683f7a0f8f28ef203a3b54719f242ff0","source_url":"https://github.com/anpa1200/sigma/blob/b249e9683190cffdcaf188ccbfb90bf4759844e1/rules/windows/builtin/security/win_security_susp_opened_encrypted_zip_outlook.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 (Email Attachment)\nid: 571498c8-908e-40b4-910b-d2369159a3da\nstatus: test\ndescription: Detects the extraction of password protected ZIP archives. 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.initial-access\n    - attack.stealth\n    - attack.t1027\n    - attack.t1566.001\nlogsource:\n    product: windows\n    service: security\ndetection:\n    selection:\n        EventID: 5379\n        TargetName|contains|all:\n            - 'Microsoft_Windows_Shell_ZipFolder:filename'\n            - '\\Temporary Internet Files\\Content.Outlook'\n    condition: selection\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/T1566.001","id":"T1566.001","name":"Spearphishing Attachment","page":"techniques/enterprise/T1566.001/"}],"data_path":"data/detection-rules/571498c8-908e-40b4-910b-d2369159a3da.json","kind":"sigma"}