Suspicious Extrac32 Execution

calendar Aug 12, 2024 · attack.command-and-control attack.t1105  ·
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Download or Copy file with Extrac32

Sigma rule (View on GitHub)

 1title: Suspicious Extrac32 Execution
 2id: aa8e035d-7be4-48d3-a944-102aec04400d
 3status: test
 4description: Download or Copy file with Extrac32
 5references:
 6    - https://lolbas-project.github.io/lolbas/Binaries/Extrac32/
 7author: frack113
 8date: 2021-11-26
 9modified: 2022-08-13
10tags:
11    - attack.command-and-control
12    - attack.t1105
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_lolbas:
18        - CommandLine|contains: extrac32.exe
19        - Image|endswith: '\extrac32.exe'
20        - OriginalFileName: 'extrac32.exe'
21    selection_archive:
22        CommandLine|contains: '.cab'
23    selection_options:
24        CommandLine|contains:
25            - /C
26            - /Y
27            - ' \\\\'
28    condition: all of selection_*
29falsepositives:
30    - Unknown
31level: medium

References

  • Extrac32 on LOLBAS

    Extrac32.exe is a living-of-the-land file containing unexpected functionality that can be abused by attackers; this page lists all its use cases.


    Read More

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