Analysing ClickFix: 3 Reasons Why Copy/Paste Attacks Are Driving Security Breaches

ClickFix, FileFix, fake CAPTCHA and related techniques describe attacks where users are tricked into running malicious browser code after copying from the clipboard. According to Push Security, ClickFix is known to be regularly used by the Interlock ransomware group and other prolific threat actors, including state-sponsored APTs, with breaches such as Kettering Health, DaVita, City of St. Paul, Minnesota, and the Texas Tech University Health Sciences Centers linked to ClickFix-style techniques.

Reason 1 attributes strong effectiveness to users unprepared for these lures, noting that malicious clipboard actions are often performed behind the scenes via JavaScript and that increasingly legitimate-looking sites blur the line between benign and malicious. Reason 2 explains how ClickFix evades delivery-time detections through domain rotation, obfuscation and non-email delivery vectors like malvertising and SEO poisoning via Google Search.

Reason 3 argues that EDR is the last line of defence and is not foolproof, since actions are user-initiated and may lack clear bad signatures, leaving organisations reliant on endpoint protection. Push Security is promoting a browser-based malicious-copy-paste detection as an early stop to these attacks.