Password Protected ZIP File Opened (Email Attachment)

calendar Oct 17, 2023 · attack.defense_evasion attack.initial_access attack.t1027 attack.t1566.001  ·
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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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