The Captcha Was The Attack

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You went looking for something ordinary. A free PDF tool, a quick download, a document someone sent. You land on a page that looks right, and it shows you a box. “Prove you’re human. Press the Windows key and R, then paste what we copied for you.”
 

Do that, and you install the malware yourself. No attachment, no stolen password. Your security tools see you run a command, and you’re allowed to run commands. The technique is called ClickFix, and security teams now rank it among the most common ways attackers get in, behind almost nothing except phishing. It doesn’t hold still. A fake captcha today, a fake error tomorrow, a fake software update the week after.

That churn is the point. You can’t beat this by sticking to sites you trust, or by learning to spot last week’s version. The page might be a hijacked real site. The top search result can be planted. An AI assistant can hand you a poisoned link just as easily. So the rule isn’t about the source. It’s about the ask. No honest website needs you to open a command box or paste a command to prove you’re human or fix an error. And when the same page hands you both the problem and the fix, they came from the same place. Close the tab.

One more habit while you’re at it. The same AI tools that can hand you a bad link are also where your team pastes contracts and client data to save time. Treat anything you type into a chatbot like a postcard, not a diary.

Teach both to your staff tonight, and your family after.

NexusTek is a CMMC L2-certified managed service provider serving small and mid-sized businesses across the United States.

Learn more about NexusTek Cyber Security Services here: https://www.nexustek.com/cybersecurity-services