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Indexed Rules
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CLI Versions
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Newest: 2.0.2
Translation Workspace
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Tune Translation
Active Rule
Suspicious Space Characters in RunMRU Registry Path - ClickFix
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Suspicious Space Characters in RunMRU Registry Path - ClickFix
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: Suspicious Space Characters in RunMRU Registry Path - ClickFix
id: 7a1b4c5e-8f3d-4b9a-7c2e-1f4a5b8c6d9e
related:
- id: 3ae9974a-eb09-4044-8e70-8980a50c12c8
type: similar
status: experimental
description: |
Detects the occurrence of numerous space characters in RunMRU registry paths, which may indicate execution via phishing lures using clickfix techniques to hide malicious commands in the Windows Run dialog box from naked eyes.
references:
- https://expel.com/blog/cache-smuggling-when-a-picture-isnt-a-thousand-words/
- https://github.com/JohnHammond/recaptcha-phish
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-11-04
tags:
- attack.execution
- attack.t1204.004
- attack.defense-evasion
- attack.t1027.010
logsource:
category: registry_set
product: windows
detection:
selection_key:
TargetObject|contains: '\Software\Microsoft\Windows\CurrentVersion\Explorer\RunMRU\'
Details|contains: '#'
selection_space_variation:
Details|contains:
- ' ' # En Quad (U+2000)
- ' ' # Em Quad (U+2001)
- ' ' # En Space (U+2002)
- ' ' # Em Space (U+2003)
- ' ' # Three-Per-Em Space (U+2004)
- ' ' # Four-Per-Em Space (U+2005)
- ' ' # Six-Per-Em Space (U+2006)
- ' ' # Figure Space (U+2007)
- ' ' # Punctuation Space (U+2008)
- ' ' # Thin Space (U+2009)
- ' ' # Hair Space (U+200A)
- ' ' # No-Break Space (U+00A0)
- ' ' # Normal space
condition: all of selection_*
falsepositives:
- Unlikely
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_susp_runmru_space_character.yml