Anatomy of a ClickFix Attack: From Fake CAPTCHA to Full Compromise

ClickFix, a social engineering technique first identified in 2023, has matured into one of the most effective and widely deployed attack methods — precisely because it does not look like an attack. A victim lands on a convincing fake webpage, is instructed to paste a command already loaded onto their clipboard into Windows Run or macOS Terminal, and press Enter. A fully functional payload executes directly in memory — no exploit, no vulnerability, no file written to disk — and what follows is a textbook compromise: infostealer and backdoor malware hunting for cryptocurrency wallet data, session tokens, cookies, and VPN and SSH configuration files.

The problem ClickFix poses is structural: its execution chains run almost entirely through legitimate tools and trusted user behavior, which is exactly why EDR and antivirus routinely miss it. In this webinar, RL threat researcher Toni Dujmović breaks down the anatomy of a ClickFix attack — the Malware-as-a-Service infrastructure that enables it, the ways it abuses user trust, and the payload families it delivers. He will also show why YARA-based structural analysis, targeting the HTML delivery mechanism itself rather than the payload behind it, is the most reliable intervention point currently available.

Attendees will learn:

• The anatomy of a ClickFix attack, from its MaaS infrastructure to the malicious payloads it delivers
• Why ClickFix's reliance on legitimate tools and trusted user behavior makes it structurally invisible to EDR and antivirus
• Why YARA-based structural analysis is the best defense against the ClickFix HTML delivery mechanism