WinRAR Execution in Non-Standard Folder

Title: WinRAR Execution in Non-Standard Folder
Status: test
Description:Detects a suspicious WinRAR execution in a folder which is not the default installation folder
References:
  -https://twitter.com/cyb3rops/status/1460978167628406785
Author: Florian Roth (Nextron Systems), Tigzy
Date: 2021-11-17
modified:2025-07-16
Tags:

• -'attack.collection'
• -'attack.t1560.001'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection:
    - Image|endswith:
      - '\rar.exe'
      - '\winrar.exe'
    - Description:
      - 'Command line RAR'
      - 'WinRAR'
  filter_main_unrar:
    Image|endswith: '\UnRAR.exe'
  filter_main_path:
    Image|contains:
      -':\Program Files (x86)\WinRAR\'
      -':\Program Files\WinRAR\'

  filter_optional_temp:
    Image|contains: ':\Windows\Temp\'
  condition:selection and not 1 of filter_main_* and not 1 of filter_optional_*
Falsepositives:
  -Legitimate use of WinRAR in a folder of a software that bundles WinRAR
Level: medium