WMI Module Loaded By Uncommon Process

SIGMA detection rule by Roberto Rodriguez @Cyb3rWard0g · NOASSERTION

Detects WMI modules being loaded by an uncommon process

title: WMI Module Loaded By Uncommon Process
id: 671bb7e3-a020-4824-a00e-2ee5b55f385e
status: test
description: Detects WMI modules being loaded by an uncommon process
references:
    - https://threathunterplaybook.com/hunts/windows/190811-WMIModuleLoad/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g
date: 2019-08-10
modified: 2026-06-29
tags:
    - attack.execution
    - attack.t1047
    - detection.threat-hunting
logsource:
    category: image_load
    product: windows
detection:
    selection:
        ImageLoaded|endswith:
            - '\fastprox.dll'
            - '\wbemcomn.dll'
            - '\wbemprox.dll'
            - '\wbemsvc.dll'
            - '\WmiApRpl.dll'
            - '\wmiclnt.dll'
            - '\WMINet_Utils.dll'
            - '\wmiprov.dll'
            - '\wmiutils.dll'
    filter_main_generic:
        Image|contains:
            - ':\Program Files (x86)\'
            - ':\Program Files\'
            - ':\Windows\explorer.exe'
            - ':\Windows\Microsoft.NET\Framework\'
            - ':\Windows\Microsoft.NET\FrameworkArm\'
            - ':\Windows\Microsoft.NET\FrameworkArm64\'
            - ':\Windows\Microsoft.NET\Framework64\'
            - ':\Windows\System32\'
            - ':\Windows\SysWOW64\'
    filter_optional_other:
        Image|endswith:
            - '\WindowsAzureGuestAgent.exe'
            - '\WaAppAgent.exe'
    filter_optional_thor:
        Image|endswith:
            - '\thor.exe'
            - '\thor64.exe'
    filter_optional_defender:
        Image|endswith: '\MsMpEng.exe'
    filter_optional_teams:
        Image|contains:
            - '\Microsoft\Teams\current\Teams.exe'
            - '\Microsoft\Teams\Update.exe'
    filter_optional_sysmon:
        Image|endswith:
            - ':\Windows\Sysmon.exe'
            - ':\Windows\Sysmon64.exe'
            - ':\Windows\Sysmon64a.exe'
    condition: selection and not 1 of filter_main_* and not 1 of filter_optional_*
falsepositives:
    - Unknown
level: low

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

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