Suspicious Indirect Inline Command Execution Through Bash.EXE (via process_creation)

title: Suspicious Indirect Inline Command Execution Through Bash.EXE (via process_creation)
id: b6754d43-8129-54e9-a85b-1355089a43f6
status: stable
description: This rule detects execution of Microsoft bash launcher with the "-c" flag. This can be leveraged to potentially bypass defenses and execute Linux or Windows-based binaries directly via bash.
references:
    - https://attack.mitre.org/techniques/T1202/
    - https://lolbas-project.github.io/lolbas/Binaries/Bash/
author: Huntrule Team
date: 2026-01-10
tags:
    - attack.stealth
    - attack.t1202
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith:
              - ':\Windows\System32\bash.exe'
              - ':\Windows\SysWOW64\bash.exe'
        - OriginalFileName: 'Bash.exe'
    selection_cli:
        CommandLine|contains: ' -c '
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium