Password Protected Compressed File Extraction Via 7Zip

 1title: Password Protected Compressed File Extraction Via 7Zip
 2id: b717b8fd-6467-4d7d-b3d3-27f9a463af77
 3status: experimental
 4description: Detects usage of 7zip utilities (7z.exe, 7za.exe and 7zr.exe) to extract password protected zip files.
 5references:
 6    - https://blog.cyble.com/2022/06/07/bumblebee-loader-on-the-rise/
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2023/03/10
 9tags:
10    - attack.collection
11    - attack.t1560.001
12logsource:
13    category: process_creation
14    product: windows
15detection:
16    selection_img:
17        - Description|contains: '7-Zip'
18        - Image|endswith:
19              - '\7z.exe'
20              - '\7zr.exe'
21              - '\7za.exe'
22        - OriginalFileName:
23              - '7z.exe'
24              - '7za.exe'
25    selection_password:
26        CommandLine|contains|all:
27            - ' -p'
28            - ' x '
29            - ' -o'
30    condition: all of selection_*
31falsepositives:
32    - Legitimate activity is expected since extracting files with a password can be common in some environment.
33level: medium