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Detection rules › Sigma

Potential WMI Lateral Movement WmiPrvSE Spawned PowerShell

Status
stable
Severity
medium
Log source
product windows, category process_creation
Author
Markus Neis @Karneades
Source
github.com/SigmaHQ/sigma

Detects Powershell as a child of the WmiPrvSE process. Which could be a sign of lateral movement via WMI.

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1047 Windows Management Instrumentation, T1059.001 Command and Scripting Interpreter: PowerShell

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation

Rule body yaml

title: Potential WMI Lateral Movement WmiPrvSE Spawned PowerShell
id: 692f0bec-83ba-4d04-af7e-e884a96059b6
related:
    - id: 8a582fe2-0882-4b89-a82a-da6b2dc32937
      type: similar
    - id: d21374ff-f574-44a7-9998-4a8c8bf33d7d
      type: similar
status: stable
description: Detects Powershell as a child of the WmiPrvSE process. Which could be a sign of lateral movement via WMI.
references:
    - https://any.run/report/68bc255f9b0db6a0d30a8f2dadfbee3256acfe12497bf93943bc1eab0735e45e/a2385d6f-34f7-403c-90d3-b1f9d2a90a5e
author: Markus Neis @Karneades
date: 2019-04-03
modified: 2023-03-29
tags:
    - attack.execution
    - attack.t1047
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_parent:
        ParentImage|endswith: '\WmiPrvSE.exe'
    selection_img:
        - Image|endswith:
              - '\powershell.exe'
              - '\pwsh.exe'
        - OriginalFileName:
              - 'PowerShell.EXE'
              - 'pwsh.dll'
    condition: all of selection_*
falsepositives:
    - AppvClient
    - CCM
    - WinRM
level: medium

Stages and Predicates

Stage 0: condition

all of selection_*

Stage 1: selection_parent

selection_parent:
    ParentImage|endswith: '\WmiPrvSE.exe'

Stage 2: selection_img

selection_img:
    - Image|endswith:
          - '\powershell.exe'
          - '\pwsh.exe'
    - OriginalFileName:
          - 'PowerShell.EXE'
          - 'pwsh.dll'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Imageends_with
  • \powershell.exe corpus 182 (sigma 182)
  • \pwsh.exe corpus 168 (sigma 168)
OriginalFileNameeq
  • PowerShell.EXE corpus 120 (sigma 84, splunk 30, elastic 6)
  • pwsh.dll corpus 112 (sigma 79, splunk 30, elastic 3)
ParentImageends_with
  • \WmiPrvSE.exe corpus 8 (sigma 8)