Detection rules › Sigma
T1047 Wmiprvse Wbemcomn DLL Hijack
Detects a threat actor creating a file named wbemcomn.dll in the C:\Windows\System32\wbem\ directory over the network for a WMI DLL Hijack scenario.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1047 Windows Management Instrumentation |
| Lateral Movement | T1021.002 Remote Services: SMB/Windows Admin Shares |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Security-Auditing | Event ID 5145 | A network share object was checked to see whether client can be granted desired access. |
Rule body yaml
title: T1047 Wmiprvse Wbemcomn DLL Hijack
id: f6c68d5f-e101-4b86-8c84-7d96851fd65c
status: test
description: Detects a threat actor creating a file named `wbemcomn.dll` in the `C:\Windows\System32\wbem\` directory over the network for a WMI DLL Hijack scenario.
references:
- https://threathunterplaybook.com/hunts/windows/201009-RemoteWMIWbemcomnDLLHijack/notebook.html
author: Roberto Rodriguez @Cyb3rWard0g, Open Threat Research (OTR)
date: 2020-10-12
modified: 2022-02-24
tags:
- attack.execution
- attack.t1047
- attack.lateral-movement
- attack.t1021.002
logsource:
product: windows
service: security
detection:
selection:
EventID: 5145
RelativeTargetName|endswith: '\wbem\wbemcomn.dll'
filter:
SubjectUserName|endswith: '$'
condition: selection and not filter
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection and not filterStage 1: selection
selection:
EventID: 5145
RelativeTargetName|endswith: '\wbem\wbemcomn.dll'
Stage 2: not filter
filter:
SubjectUserName|endswith: '$'
Exclusions
Top-level NOT(...) conjuncts: predicates this rule actively suppresses.
| Field | Kind | Excluded values |
|---|---|---|
SubjectUserName | ends_with | $ |
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.
| Field | Kind | Values |
|---|---|---|
RelativeTargetName | ends_with |
|