title: Suspicious PowerShell Parent Process
author: Teymur Kheirkhabarov, Harish Segar (rule)
date: 2020/03/20
description: Detects a suspicious parents of powershell.exe
detection:
    SELECTION_1:
        EventID: 1
    SELECTION_10:
        ParentImage: '*\msaccess.exe'
    SELECTION_11:
        ParentImage: '*\mspub.exe'
    SELECTION_12:
        ParentImage: '*\visio.exe'
    SELECTION_13:
        ParentImage: '*\outlook.exe'
    SELECTION_14:
        ParentImage: '*\amigo.exe'
    SELECTION_15:
        ParentImage: '*\chrome.exe'
    SELECTION_16:
        ParentImage: '*\firefox.exe'
    SELECTION_17:
        ParentImage: '*\iexplore.exe'
    SELECTION_18:
        ParentImage: '*\microsoftedgecp.exe'
    SELECTION_19:
        ParentImage: '*\microsoftedge.exe'
    SELECTION_2:
        ParentImage: '*\mshta.exe'
    SELECTION_20:
        ParentImage: '*\browser.exe'
    SELECTION_21:
        ParentImage: '*\vivaldi.exe'
    SELECTION_22:
        ParentImage: '*\safari.exe'
    SELECTION_23:
        ParentImage: '*\sqlagent.exe'
    SELECTION_24:
        ParentImage: '*\sqlserver.exe'
    SELECTION_25:
        ParentImage: '*\sqlservr.exe'
    SELECTION_26:
        ParentImage: '*\w3wp.exe'
    SELECTION_27:
        ParentImage: '*\httpd.exe'
    SELECTION_28:
        ParentImage: '*\nginx.exe'
    SELECTION_29:
        ParentImage: '*\php-cgi.exe'
    SELECTION_3:
        ParentImage: '*\rundll32.exe'
    SELECTION_30:
        ParentImage: '*\jbosssvc.exe'
    SELECTION_31:
        ParentImage: '*MicrosoftEdgeSH.exe'
    SELECTION_32:
        ParentImage: '*tomcat*'
    SELECTION_33:
        CommandLine: '*powershell*'
    SELECTION_34:
        CommandLine: '*pwsh*'
    SELECTION_35:
        Description: Windows PowerShell
    SELECTION_36:
        Product: PowerShell Core 6
    SELECTION_4:
        ParentImage: '*\regsvr32.exe'
    SELECTION_5:
        ParentImage: '*\services.exe'
    SELECTION_6:
        ParentImage: '*\winword.exe'
    SELECTION_7:
        ParentImage: '*\wmiprvse.exe'
    SELECTION_8:
        ParentImage: '*\powerpnt.exe'
    SELECTION_9:
        ParentImage: '*\excel.exe'
    condition: (SELECTION_1 and ((SELECTION_2 or 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 or SELECTION_12 or SELECTION_13 or SELECTION_14 or SELECTION_15
        or SELECTION_16 or SELECTION_17 or SELECTION_18 or SELECTION_19 or SELECTION_20
        or SELECTION_21 or SELECTION_22 or SELECTION_23 or SELECTION_24 or SELECTION_25
        or SELECTION_26 or SELECTION_27 or SELECTION_28 or SELECTION_29 or SELECTION_30
        or SELECTION_31) or SELECTION_32) and ((SELECTION_33 or SELECTION_34) or SELECTION_35
        or SELECTION_36))
falsepositives:
- Other scripts
id: 754ed792-634f-40ae-b3bc-e0448d33f695
level: high
logsource:
    category: process_creation
    product: windows
references:
- https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=26
status: experimental
tags:
- attack.execution
- attack.t1059.001
- attack.t1086
yml_filename: win_susp_powershell_parent_process.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation