Fake Cloudflare CAPTCHA tricks victims into opening a tunnel for attackers
Summary
Attackers are using a technique called TerminalFix, which involves fake Cloudflare CAPTCHA prompts on compromised websites to trick users into running malicious PowerShell commands. This campaign establishes persistence, conducts reconnaissance, and can lead to deeper access within an organization by leveraging DLL sideloading and payloads hidden in images.
IFF Assessment
This article details a new, sophisticated attack campaign that utilizes social engineering and advanced techniques to gain unauthorized access to systems, posing a direct threat to defenders.
Defender Context
Defenders should be aware of the TerminalFix campaign and the use of fake CAPTCHA prompts to lure victims into executing malicious commands. Implementing stricter endpoint security, user education on phishing and social engineering tactics, and robust monitoring for suspicious PowerShell activity and DLL sideloading attempts are crucial.