Detection rules › Sigma
Potential Goofy Guineapig Backdoor Activity
Detects a specific broken command that was used by Goofy-Guineapig as described by the NCSC report.
Known false positives
- Unlikely
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Execution | No specific technique |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Potential Goofy Guineapig Backdoor Activity
id: 477a5ed3-a374-4282-9f3b-ed94e159a108
status: test
description: Detects a specific broken command that was used by Goofy-Guineapig as described by the NCSC report.
references:
- https://www.ncsc.gov.uk/static-assets/documents/malware-analysis-reports/goofy-guineapig/NCSC-MAR-Goofy-Guineapig.pdf
author: X__Junior (Nextron Systems)
date: 2023-05-14
tags:
- attack.execution
- detection.emerging-threats
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains: 'choice /t %d /d y /n >nul'
condition: selection
falsepositives:
- Unlikely
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine|contains: 'choice /t %d /d y /n >nul'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match value:"choice /t %d /d y /n >nul" |