title: MSHTA Spawning Windows Shell
author: Michael Haag
date: 2019/01/16
description: Detects a Windows command line executable started from MSHTA
detection:
    SELECTION_1:
        EventID: 1
    SELECTION_10:
        Image: '*\regsvr32.exe'
    SELECTION_11:
        Image: '*\BITSADMIN*'
    SELECTION_2:
        ParentImage: '*\mshta.exe'
    SELECTION_3:
        Image: '*\cmd.exe'
    SELECTION_4:
        Image: '*\powershell.exe'
    SELECTION_5:
        Image: '*\wscript.exe'
    SELECTION_6:
        Image: '*\cscript.exe'
    SELECTION_7:
        Image: '*\sh.exe'
    SELECTION_8:
        Image: '*\bash.exe'
    SELECTION_9:
        Image: '*\reg.exe'
    condition: (SELECTION_1 and SELECTION_2 and ((SELECTION_3 or SELECTION_4 or SELECTION_5
        or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9 or SELECTION_10)
        or (SELECTION_11)))
falsepositives:
- Printer software / driver installations
- HP software
fields:
- CommandLine
- ParentCommandLine
id: 03cc0c25-389f-4bf8-b48d-11878079f1ca
level: high
logsource:
    category: process_creation
    product: windows
modified: 2020/09/01
references:
- https://www.trustedsec.com/july-2015/malicious-htas/
status: experimental
tags:
- attack.defense_evasion
- attack.t1170
- attack.t1218.005
- car.2013-02-003
- car.2013-03-001
- car.2014-04-003
yml_filename: win_mshta_spawn_shell.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation