Detection rules › Sigma
Suspicious Encoded Scripts in a WMI Consumer
Detects suspicious encoded payloads in WMI Event Consumers
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | T1047 Windows Management Instrumentation |
| Persistence | T1546.003 Event Triggered Execution: Windows Management Instrumentation Event Subscription |
| Privilege Escalation | T1546.003 Event Triggered Execution: Windows Management Instrumentation Event Subscription |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Sysmon | Event ID 19 | WmiEvent (WmiEventFilter activity detected) |
| Sysmon | Event ID 20 | WmiEvent (WmiEventConsumer activity detected) |
| Sysmon | Event ID 21 | WmiEvent (WmiEventConsumerToFilter activity detected) |
Rule body yaml
title: Suspicious Encoded Scripts in a WMI Consumer
id: 83844185-1c5b-45bc-bcf3-b5bf3084ca5b
status: test
description: Detects suspicious encoded payloads in WMI Event Consumers
references:
- https://github.com/RiccardoAncarani/LiquidSnake
author: Florian Roth (Nextron Systems)
date: 2021-09-01
modified: 2022-10-09
tags:
- attack.privilege-escalation
- attack.execution
- attack.t1047
- attack.persistence
- attack.t1546.003
logsource:
product: windows
category: wmi_event
detection:
selection_destination:
Destination|base64offset|contains:
- 'WriteProcessMemory'
- 'This program cannot be run in DOS mode'
- 'This program must be run under Win32'
condition: selection_destination
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection_destinationStage 1: selection_destination
selection_destination:
Destination|base64offset|contains:
- 'WriteProcessMemory'
- 'This program cannot be run in DOS mode'
- 'This program must be run under Win32'
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 |
|---|---|---|
Destination | match |
|