1200KM / sigma-rule
MMC Loading Script Engines DLLs — Sigma Rule
Sigma rule a9c73e8b-3b2d-4c45-8ef2-5f9a9c9998ad. MMC Loading Script Engines DLLs — Sigma Rule. Detects when the Microsoft Management Console (MMC) loads the DLL libraries like vbscript, jscript etc which might indicate an attempt to execute malicious scripts within a trusted system process for bypassing application whitelisting or defense evasion.
Rule metadata and linked tags
Author: Swachchhanda Shrawan Poudel (Nextron Systems). Source status: experimental; severity: medium. Source dates: 2025-02-05 / not supplied.
{
"category": "image_load",
"product": "windows"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: 63973c6931300b19ac0648c6295569ec13385f87def378579ffb86e522053a4e
Detection logic
Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.
title: MMC Loading Script Engines DLLs
id: a9c73e8b-3b2d-4c45-8ef2-5f9a9c9998ad
status: experimental
description: |
Detects when the Microsoft Management Console (MMC) loads the DLL libraries like vbscript, jscript etc which might indicate an attempt
to execute malicious scripts within a trusted system process for bypassing application whitelisting or defense evasion.
references:
- https://tria.ge/241015-l98snsyeje/behavioral2
- https://www.elastic.co/security-labs/grimresource
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-02-05
tags:
- attack.execution
- attack.stealth
- attack.t1059.005
- attack.t1218.014
logsource:
category: image_load
product: windows
detection:
selection:
Image|endswith: '\mmc.exe'
ImageLoaded|endswith:
- '\vbscript.dll'
- '\jscript.dll'
- '\jscript9.dll'
condition: selection
falsepositives:
- Legitimate MMC operations or extensions loading these libraries
level: medium
False positives
- Legitimate MMC operations or extensions loading these libraries
Source references
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.