Fake CAPTCHA is part of a campaign that exposes the dark side of the internet's advertising ecosystem. It thrives by targeting social media accounts, banking information, passwords, and personal files through platforms like Facebook, Google Ads, and public repositories on GitHub. These deceptive ads have been stealing information and causing financial losses for months by hijacking advertisements and replacing them with malicious CAPTCHA pages.
These fake CAPTCHAs mimic legitimate verification processes, tricking users into bypassing browser security. They prompt users to confirm they are human through a series of keyboard clicks, ultimately leading them to paste and execute a crafted PowerShell command that instantly installs stealer malware.
To combat this threat, web applications must implement proactive measures, including continuous content moderation and stricter account validation, to prevent such attacks.
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