
Mass Website Compromise Campaign Delivers LunexStealer Through Fake Cloudflare Security Checks
In September 2026, Ukraine's CERT-UA identified over 100 compromised websites injected with malicious JavaScript to distribute LunexStealer malware through fake Cloudflare verification pages. The UAC-0277 threat cluster used ClickFix techniques and EtherHiding methods to selectively target Windows users arriving from search engines, delivering MSI packages that install sophisticated information-stealing capabilities including the LUNARAXE browser extension and NAIVEMESS file system access component. This campaign represents the growing sophistication of social engineering attacks that exploit trusted security interfaces like Cloudflare to bypass user suspicion and deliver advanced persistent threats.
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