WMI Persistence - Script Event Consumer File Write

Status: test
Severity: high
Log source: category file_event, product windows
Author: Thomas Patzke
Source: github.com/SigmaHQ/sigma

Detects file writes of WMI script event consumer

Known false positives

Dell Power Manager (C:\Program Files\Dell\PowerManager\DpmPowerPlanSetup.exe)

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1546.003` Event Triggered Execution: Windows Management Instrumentation Event Subscription
Privilege Escalation	`T1546.003` Event Triggered Execution: Windows Management Instrumentation Event Subscription

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 11: FileCreate

Rule body

title: WMI Persistence - Script Event Consumer File Write
id: 33f41cdd-35ac-4ba8-814b-c6a4244a1ad4
status: test
description: Detects file writes of WMI script event consumer
references:
    - https://www.eideon.com/2018-03-02-THL03-WMIBackdoors/
author: Thomas Patzke
date: 2018-03-07
modified: 2021-11-27
tags:
    - attack.privilege-escalation
    - attack.t1546.003
    - attack.persistence
logsource:
    product: windows
    category: file_event
detection:
    selection:
        Image: 'C:\WINDOWS\system32\wbem\scrcons.exe'
    condition: selection
falsepositives:
    - Dell Power Manager (C:\Program Files\Dell\PowerManager\DpmPowerPlanSetup.exe)
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image: 'C:\WINDOWS\system32\wbem\scrcons.exe'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`Image`	eq	`C:\WINDOWS\system32\wbem\scrcons.exe` corpus 2 (sigma 2)	`field:"Image" kind:eq value:"C:\WINDOWS\system32\wbem\scrcons.exe"`

WMI Persistence - Script Event Consumer File Write

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`