WMI ActiveScriptEventConsumers Activity Via Scrcons.EXE DLL Load


Description

Detects signs of the WMI script host process "scrcons.exe" loading scripting DLLs which could indicates WMI ActiveScriptEventConsumers EventConsumers activity.

Query · sigma

selection:
  Image|endswith: \scrcons.exe
  ImageLoaded|endswith:
  - \vbscript.dll
  - \wbemdisp.dll
  - \wshom.ocx
  - \scrrun.dll
condition: selection

Known false positives

  • Legitimate event consumers
  • Dell computers on some versions register an event consumer that is known to cause false positives when brightness is changed by the corresponding keyboard button
Raw source WMI ActiveScriptEventConsumers Activity Via Scrcons.EXE DLL Load · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified.
title: WMI ActiveScriptEventConsumers Activity Via Scrcons.EXE DLL Load
id: b439f47d-ef52-4b29-9a2f-57d8a96cb6b8
status: test
description: Detects signs of the WMI script host process "scrcons.exe" loading scripting DLLs which could indicates WMI ActiveScriptEventConsumers EventConsumers activity.
references:
    - https://twitter.com/HunterPlaybook/status/1301207718355759107
    - https://www.mdsec.co.uk/2020/09/i-like-to-move-it-windows-lateral-movement-part-1-wmi-event-subscription/
    - https://threathunterplaybook.com/hunts/windows/200902-RemoteWMIActiveScriptEventConsumers/notebook.html
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2020-09-02
modified: 2023-02-22
tags:
    - attack.lateral-movement
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1546.003
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Image|endswith: '\scrcons.exe'
        ImageLoaded|endswith:
            - '\vbscript.dll'
            - '\wbemdisp.dll'
            - '\wshom.ocx'
            - '\scrrun.dll'
    condition: selection
falsepositives:
    - Legitimate event consumers
    - Dell computers on some versions register an event consumer that is known to cause false positives when brightness is changed by the corresponding keyboard button
level: medium

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