title: Windows Processes Suspicious Parent Directory
id: 96036718-71cc-4027-a538-d1587e0006a7
status: experimental
description: Detect suspicious parent processes of well-known Windows processes
author: vburov
references:
    - https://securitybytes.io/blue-team-fundamentals-part-two-windows-processes-759fe15965e2
    - https://www.carbonblack.com/2014/06/10/screenshot-demo-hunt-evil-faster-than-ever-with-carbon-black/
    - https://www.13cubed.com/downloads/windows_process_genealogy_v2.pdf
    - https://attack.mitre.org/techniques/T1036/
date: 2019/02/23
modified: 2020/09/06
tags:
    - attack.defense_evasion
    - attack.t1036 # an old one
    - attack.t1036.003
    - attack.t1036.005
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image:
            - '*\svchost.exe'
            - '*\taskhost.exe'
            - '*\lsm.exe'
            - '*\lsass.exe'
            - '*\services.exe'
            - '*\lsaiso.exe'
            - '*\csrss.exe'
            - '*\wininit.exe'
            - '*\winlogon.exe'
    filter:
        ParentImage:
            - '*\System32\\*'
            - '*\SysWOW64\\*'
            - '*\SavService.exe'
            - '*\Windows Defender\\*\MsMpEng.exe'
    filter_null:
        ParentImage: null
    condition: selection and not filter and not filter_null
falsepositives:
    - Some security products seem to spawn these
level: low
