sigmamediumHunting

Suspicious Extrac32 Execution

Download or Copy file with Extrac32

MITRE ATT&CK

command-and-control

Detection Query

selection_lolbas:
  - CommandLine|contains: extrac32.exe
  - Image|endswith: \extrac32.exe
  - OriginalFileName: extrac32.exe
selection_archive:
  CommandLine|contains: .cab
selection_options:
  CommandLine|contains:
    - /C
    - /Y
    - " \\\\\\\\"
condition: all of selection_*

Author

frack113

Created

2021-11-26

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://lolbas-project.github.io/lolbas/Binaries/Extrac32/

Tags

attack.command-and-controlattack.t1105

Raw Content

title: Suspicious Extrac32 Execution
id: aa8e035d-7be4-48d3-a944-102aec04400d
status: test
description: Download or Copy file with Extrac32
references:
    - https://lolbas-project.github.io/lolbas/Binaries/Extrac32/
author: frack113
date: 2021-11-26
modified: 2022-08-13
tags:
    - attack.command-and-control
    - attack.t1105
logsource:
    category: process_creation
    product: windows
detection:
    selection_lolbas:
        - CommandLine|contains: extrac32.exe
        - Image|endswith: '\extrac32.exe'
        - OriginalFileName: 'extrac32.exe'
    selection_archive:
        CommandLine|contains: '.cab'
    selection_options:
        CommandLine|contains:
            - /C
            - /Y
            - ' \\\\'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium