ClickFix Pastejacking via Script Interpreter Command in Run Dialog MRU (via registry_set)

ATT&CK techniques

Execution

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
- T1204.001Malicious Link
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects ClickFix pastejacking where a clipboard-injected download-and-execute command is entered through the Windows Run dialog and recorded in the Explorer RunMRU key. Adversaries leverage the Run dialog to have the victim manually launch a script interpreter, so PowerShell or download utilities appearing in RunMRU history is a strong user-assisted execution indicator.

Reporting behind it

Related detections9 linkedT1059.001 — drag to rearrange

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Malicious IIS Worker Process Spawning Command Shell for Webshell Reconnaissance (via process_creation)

Suspicious PowerShell Spawned by Windows Script Host during Scarlet Goldfinch Infection (via process_creation)

Suspicious PowerShell Launched by MSIX StartingScriptWrapper From WindowsApps via Process Creation (via process_creation)

Malicious Command Shell or PowerShell Spawned by Tomcat via Process Creation (via process_creation)

ClickFix Pastejacking via Script Interpreter Command in Run Dialog MRU (via registry_set)

Pivot detection · T1059.001 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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