Password Protected ZIP File Opened (Suspicious Filenames)

 1title: Password Protected ZIP File Opened (Suspicious Filenames)
 2id: 54f0434b-726f-48a1-b2aa-067df14516e4
 3status: experimental
 4description: 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.
 5references:
 6    - https://twitter.com/sbousseaden/status/1523383197513379841
 7author: Florian Roth (Nextron Systems)
 8date: 2022/05/09
 9tags:
10    - attack.command_and_control
11    - attack.defense_evasion
12    - attack.t1027
13    - attack.t1105
14    - attack.t1036
15logsource:
16    product: windows
17    service: security
18detection:
19    selection:
20        EventID: 5379
21        TargetName|contains: 'Microsoft_Windows_Shell_ZipFolder:filename'
22    selection_filename:
23        TargetName|contains:
24            - 'invoice'
25            - 'new order'
26            - 'rechnung'
27            - 'factura'
28            - 'delivery'
29            - 'purchase'
30            - 'order'
31            - 'payment'
32    condition: selection and selection_filename
33falsepositives:
34    - Legitimate used of encrypted ZIP files
35level: high