SigmaHQ/rules/windows/process_creation/win_mshta_spawn_shell.yml

title: MSHTA Spawning Windows Shell
id: 03cc0c25-389f-4bf8-b48d-11878079f1ca
status: experimental
description: Detects a Windows command line executable started from MSHTA
references:
    - https://www.trustedsec.com/july-2015/malicious-htas/
author: Michael Haag
date: 2019/01/16
modified: 2020/09/01
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\mshta.exe'
    selection2:
        - Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
            - '\wscript.exe'
            - '\cscript.exe'
            - '\sh.exe'
            - '\bash.exe'
            - '\reg.exe'
            - '\regsvr32.exe'
        - Image|contains:
            - '\BITSADMIN'
    condition: selection and selection2
fields:
    - CommandLine
    - ParentCommandLine
tags:
    - attack.defense_evasion
    - attack.t1170          # an old one
    - attack.t1218.005
    - car.2013-02-003
    - car.2013-03-001
    - car.2014-04-003
falsepositives:
    - Printer software / driver installations
    - HP software
level: high