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ClickFix Turns “Troubleshooting” Into Code Execution

How fake CAPTCHAs and meeting errors persuade users to run attacker-provided commands—and how to interrupt the pattern.

By Alex Castrillo3 min readFact-checked August 28, 2026
ClickFix Turns “Troubleshooting” Into Code Execution

ClickFix is a social-engineering pattern: a page claims something is broken and instructs the user to paste or run a command as the fix. The user becomes the execution path.

What the evidence supports

A joint CISA advisory on Interlock ransomware describes ClickFix as a technique that uses fake CAPTCHA prompts to trick users into executing malicious PowerShell. That evidence supports training and execution-control recommendations; it does not mean every browser error or CAPTCHA is malicious.

Why it matters to a Connecticut operator

Fast-moving retail and operations teams are conditioned to resolve interruptions quickly. A clear rule—never paste a command from a webpage into a terminal or Run dialog—gives employees a useful stop signal.

Operator checklist

  • Teach the exact behavior: no legitimate CAPTCHA or meeting page should require a pasted system command.
  • Restrict script interpreters and command execution for users who do not need them.
  • Log suspicious PowerShell activity and preserve the URL, screenshot, and command when reporting an event.
  • Give employees a fast support channel so stopping to verify is easier than improvising a fix.
Scope note: This briefing separates documented facts from practical recommendations. It is cybersecurity guidance, not legal advice or a statement that every recommended control is expressly required by Connecticut cannabis regulations.

Primary sources

About the author

Alex Castrillo

Founder of CannaShield. Working cyber incident response analyst and vCISO for licensed cannabis operators. Writes on cannabis breach analysis, GRC, cyber insurance readiness, and email-spoofing risk.

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