Detection rules › Sigma
Renamed Plink Execution
Detects the execution of a renamed version of the Plink binary
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Renamed Plink Execution
id: 1c12727d-02bf-45ff-a9f3-d49806a3cf43
status: test
description: Detects the execution of a renamed version of the Plink binary
references:
- https://thedfirreport.com/2022/06/06/will-the-real-msiexec-please-stand-up-exploit-leads-to-data-exfiltration/
- https://the.earth.li/~sgtatham/putty/0.58/htmldoc/Chapter7.html
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-06
modified: 2023-02-03
tags:
- attack.stealth
- attack.t1036
logsource:
category: process_creation
product: windows
detection:
selection:
- OriginalFileName: 'Plink'
- CommandLine|contains|all:
- ' -l forward'
- ' -P '
- ' -R '
filter:
Image|endswith: '\plink.exe'
condition: selection and not filter
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selection and not filterStage 1: selection
selection:
- OriginalFileName: 'Plink'
- CommandLine|contains|all:
- ' -l forward'
- ' -P '
- ' -R '
Stage 2: not filter
filter:
Image|endswith: '\plink.exe'
Exclusions
The rule actively suppresses these predicates.
| Field | Kind | Excluded values | Search |
|---|---|---|---|
Image | ends_with | \plink.exe | excludes:Image field:"Image" value:"\plink.exe" |
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq value:"Plink" |