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Newest: 2.0.2

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Active Rule

Potentially Suspicious Command Executed Via Run Dialog Box - Registry

sigma-cli version

Backend

Format

Target Profile

Splunk

Splunk SPL & tstats data model queries

Format Mode

Default

Plain SPL queries

Conversion Output

Potentially Suspicious Command Executed Via Run Dialog Box - Registry

Using Splunk · Default · sigma-cli 2.0.2

Translation controls

Adjust the rule on the left, then regenerate when you want a fresh backend-native query.

BackendSplunkFormatDefaultVersion2.0.2

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