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WmiPrvSE Spawned A Process

Detects WmiPrvSE spawning a process

MITRE ATT&CK

execution

Detection Query

selection:
  ParentImage|endswith: \WmiPrvSe.exe
filter_logonid:
  LogonId:
    - "0x3e7"
    - "null"
filter_system_user:
  User|contains:
    - AUTHORI
    - AUTORI
filter_wmiprvse:
  Image|endswith: \WmiPrvSE.exe
filter_werfault:
  Image|endswith: \WerFault.exe
filter_null:
  LogonId: null
condition: selection and not 1 of filter_*

Author

Roberto Rodriguez @Cyb3rWard0g

Created

2019-08-15

Data Sources

windowsProcess Creation Events

Platforms

windows

References

https://threathunterplaybook.com/hunts/windows/190815-RemoteServiceInstallation/notebook.html

Tags

attack.executionattack.t1047

Raw Content

title: WmiPrvSE Spawned A Process
id: d21374ff-f574-44a7-9998-4a8c8bf33d7d
related:
    - id: 8a582fe2-0882-4b89-a82a-da6b2dc32937
      type: similar
    - id: 692f0bec-83ba-4d04-af7e-e884a96059b6
      type: similar
status: stable
description: Detects WmiPrvSE spawning a process
references:
    - https://threathunterplaybook.com/hunts/windows/190815-RemoteServiceInstallation/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g
date: 2019-08-15
modified: 2023-03-23
tags:
    - attack.execution
    - attack.t1047
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\WmiPrvSe.exe'
    filter_logonid:
        LogonId:
            - '0x3e7'  # LUID 999 for SYSTEM
            - 'null'   # too many false positives
    filter_system_user:
        User|contains: # covers many language settings
            - 'AUTHORI'
            - 'AUTORI'
    filter_wmiprvse:
        Image|endswith: '\WmiPrvSE.exe'
    filter_werfault:
        Image|endswith: '\WerFault.exe'
    filter_null:  # some backends need the null value in a separate expression
        LogonId: null
    condition: selection and not 1 of filter_*
falsepositives:
    - False positives are expected (e.g. in environments where WinRM is used legitimately)
level: medium