How to Protect Yourself from the Fake CAPTCHA Malware Attack

Overview

A sophisticated malware known as Lumma Stealer is spreading in a new way: it uses fake CAPTCHA pages to trick you into infecting your own computer. Often delivered through malicious ads, this method is designed to bypass security software by getting you to do the work. Understanding how this scam works is the first step toward keeping your personal data safe.

How the Lumma Attack Works

This attack unfolds in three simple steps that rely on tricking you:

  1. The Deceptive CAPTCHA: You land on a webpage with what looks like a normal CAPTCHA test to prove you're human. However, the page instructs you to copy a block of text and run it as a command for "verification." This copies a hidden, malicious script to your clipboard.
  2. Running the Command: The site then guides you to open the Windows "Run" dialog box (by pressing the Windows Key + R), paste the script you just copied, and hit Enter.
  3. Infection and Data Theft: Executing this command installs the malware on your PC. It then connects to the attacker's server, giving them the ability to steal your personal files, passwords, and other sensitive information.

How to Protect Yourself from Lumma Malware

Because this threat relies on your actions, your awareness and security settings are the most powerful defenses. Be vigilant and aware; the best defense is to recognize the trap before you fall for it.

Actionable Tips:

  • Question Unusual Requests: Be extremely skeptical of any website that asks you to copy, paste, and run a command. Verifying you're human should never require this step.
  • Learn to Spot the Signs: Look for pressuring language or instructions that seem overly technical or strange for a simple website verification.
  • When in Doubt, Leave: If a prompt feels off or makes you uncomfortable, the safest action is to immediately close the browser tab or window.

As cyber threats become more creative, so must our approach to personal security. By being vigilant online, securing your computer, and keeping your software updated, you can build a strong defense to protect your valuable data from threats like Lumma malware.
 

Still Need Help?

If you have additional questions about this topic, please contact the OIT Help Desk.

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