Wmiprvse Wbemcomn DLL Hijack

Hunt Hypothesis

Detects a threat actor creating a file named wbemcomn.dll in the C:\Windows\System32\wbem\ directory over the network and loading it for a WMI DLL Hijack scenario.

Detection Rule

Sigma (Original)

title: Wmiprvse Wbemcomn DLL Hijack
id: 7707a579-e0d8-4886-a853-ce47e4575aaa
status: test
description: Detects a threat actor creating a file named `wbemcomn.dll` in the `C:\Windows\System32\wbem\` directory over the network and loading it for a WMI DLL Hijack scenario.
references:
    - https://threathunterplaybook.com/hunts/windows/201009-RemoteWMIWbemcomnDLLHijack/notebook.html
author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research)
date: 2020-10-12
modified: 2022-10-09
tags:
    - attack.execution
    - attack.t1047
    - attack.lateral-movement
    - attack.t1021.002
logsource:
    product: windows
    category: image_load
detection:
    selection:
        Image|endswith: '\wmiprvse.exe'
        ImageLoaded|endswith: '\wbem\wbemcomn.dll'
    condition: selection
falsepositives:
    - Unknown
level: high

KQL (Microsoft 365 Defender)

DeviceImageLoadEvents
| where InitiatingProcessFolderPath endswith "\\wmiprvse.exe" and FolderPath endswith "\\wbem\\wbemcomn.dll"

Required Data Sources

False Positive Guidance

• Unknown

MITRE ATT&CK Context

• Tactic: Execution
• Tactic: Lateral Movement
• Technique: T1047 — T1047
• Technique: T1021.002 — T1021.002

References

• https://threathunterplaybook.com/hunts/windows/201009-RemoteWMIWbemcomnDLLHijack/notebook.html
• SigmaHQ Rule