ClickFix HTML anti-analysis DevTools-blocking keydown handler

Ibrahim Saud@tektrix

•updated Sep 22, 2026•0•0•4

Detects JavaScript code within HTML pages designed to block browser developer tools (F12, Inspect, View Source) using keydown event listeners. This technique is commonly associated with ClickFix-style phishing campaigns to prevent users or security analysts from inspecting malicious page content or fake CAPTCHA overlays.