Always Install Elevated MSI Spawned Cmd And Powershell — Sigma Rule

Rule metadata and linked tags

Author: Teymur Kheirkhabarov (idea), Mangatas Tondang (rule), oscd.community. Source status: test; severity: medium. Source dates: 2020-10-13 / 2022-10-20.

{
  "product": "windows",
  "category": "process_creation"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: a721370f479acae933bebf3249e784d2bc607773e7c03692dda4f52ef4396dd9

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: Always Install Elevated MSI Spawned Cmd And Powershell
id: 1e53dd56-8d83-4eb4-a43e-b790a05510aa
status: test
description: Detects Windows Installer service (msiexec.exe) spawning "cmd" or "powershell"
references:
    - https://image.slidesharecdn.com/kheirkhabarovoffzonefinal-181117201458/95/hunting-for-privilege-escalation-in-windows-environment-50-638.jpg
author: Teymur Kheirkhabarov (idea), Mangatas Tondang (rule), oscd.community
date: 2020-10-13
modified: 2022-10-20
tags:
    - attack.privilege-escalation
    - attack.t1548.002
logsource:
    product: windows
    category: process_creation
detection:
    selection_img:
        - Image|endswith:
              - '\cmd.exe'
              - '\powershell.exe'
              - '\pwsh.exe'
        - OriginalFileName:
              - 'Cmd.Exe'
              - 'PowerShell.EXE'
              - 'pwsh.dll'
    selection_parent:
        ParentImage|contains|all:
            - '\Windows\Installer\'
            - 'msi'
        ParentImage|endswith: 'tmp'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://image.slidesharecdn.com/kheirkhabarovoffzonefinal-181117201458/95/hunting-for-privilege-escalation-in-windows-environment-50-638.jpg