Password Protected ZIP File Opened (Email Attachment)

Detects the extraction of password protected ZIP archives. See the filename variable for more details on which file has been opened.

Sigma rule (View on GitHub)

 1title: Password Protected ZIP File Opened (Email Attachment)
 2id: 571498c8-908e-40b4-910b-d2369159a3da
 3status: test
 4description: Detects the extraction of password protected ZIP archives. See the filename variable for more details on which file has been opened.
 5references:
 6    - https://twitter.com/sbousseaden/status/1523383197513379841
 7author: Florian Roth (Nextron Systems)
 8date: 2022-05-09
 9tags:
10    - attack.defense-evasion
11    - attack.initial-access
12    - attack.t1027
13    - attack.t1566.001
14logsource:
15    product: windows
16    service: security
17detection:
18    selection:
19        EventID: 5379
20        TargetName|contains|all:
21            - 'Microsoft_Windows_Shell_ZipFolder:filename'
22            - '\Temporary Internet Files\Content.Outlook'
23    condition: selection
24falsepositives:
25    - Legitimate used of encrypted ZIP files
26level: high

References

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