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Newest: 1.3.3
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Active Rule
Potentially Suspicious Command Executed Via Run Dialog Box - Registry
Target Profile
Splunk
Splunk through pysigma-backend-splunk.
Format Mode
Default
Default pySigma output mode for this backend.
Conversion Output
Potentially Suspicious Command Executed Via Run Dialog Box - Registry
Using Splunk · Default · pySigma 1.3.3
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion1.3.3
title: Potentially Suspicious Command Executed Via Run Dialog Box - Registry
id: a7df0e9e-91a5-459a-a003-4cde67c2ff5d
related:
- id: f9d091f6-f1c7-4873-a24f-050b4a02b4dd
type: derived
status: test
description: |
Detects execution of commands via the run dialog box on Windows by checking values of the "RunMRU" registry key.
This technique was seen being abused by threat actors to deceive users into pasting and executing malicious commands, often disguised as CAPTCHA verification steps.
references:
- https://medium.com/@ahmed.moh.farou2/fake-captcha-campaign-on-arabic-pirated-movie-sites-delivers-lumma-stealer-4f203f7adabf
- https://medium.com/@shaherzakaria8/downloading-trojan-lumma-infostealer-through-capatcha-1f25255a0e71
- https://www.forensafe.com/blogs/runmrukey.html
- https://redcanary.com/blog/threat-intelligence/intelligence-insights-october-2024/
author: Ahmed Farouk, Nasreddine Bencherchali
date: 2024-11-01
tags:
- attack.execution
- attack.t1059.001
logsource:
product: windows
category: registry_set
detection:
selection_key:
TargetObject|contains: '\Microsoft\Windows\CurrentVersion\Explorer\RunMRU'
selection_powershell_command:
Details|contains:
- 'powershell'
- 'pwsh'
selection_powershell_susp_keywords:
Details|contains:
- ' -e '
- ' -ec '
- ' -en '
- ' -enc '
- ' -enco'
- 'ftp'
- 'Hidden'
- 'http'
- 'iex'
- 'Invoke-'
selection_wmic_command:
Details|contains: 'wmic'
selection_wmic_susp_keywords:
Details|contains:
- 'shadowcopy'
- 'process call create'
condition: selection_key and (all of selection_powershell_* or all of selection_wmic_*)
falsepositives:
- Unknown
level: high
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules/windows/registry/registry_set/registry_set_runmru_susp_command_execution.yml