Fake Cloudflare CAPTCHA on compromised Ukrainian websites installs Psychedelic Stealer malware

Attackers compromised legitimate Ukrainian business websites and used fake Cloudflare verification pages to trick visitors into installing malware. Arctic Wolf says the campaign injects attacker-controlled iframes into real sites, then uses a ClickFix-style lure that copies an msiexec command and tells users to paste it into the Windows Run dialog. The downloaded MSI installs a newly identified infostealer dubbed Psychedelic Stealer, which steals browser passwords, account tokens, and cryptocurrency-wallet data, sets scheduled-task persistence, and can fetch additional payloads. A leaked management panel showed 557 lure interactions across 32 countries, mostly in Ukraine.
Why it matters: People can be infected just by visiting a real but compromised website and following fake verification steps, so this is a practical risk for users and defenders, especially in Ukraine. Organizations should hunt for injected iframes, MSI-based ClickFix chains, scheduled-task persistence, and stolen browser or wallet credentials; users should never paste commands from CAPTCHA or verification prompts into Windows Run.

Sources

Hacked Ukrainian Sites Serve Fake Cloudflare ClickFix Lures for Psychedelic Stealer
info@thehackernews.com (The Hacker News) 2026.09.24 98% relevant
This appears to be the same underlying campaign: compromised Ukrainian websites display fake Cloudflare or ClickFix-style verification prompts that trick users into executing commands that install Psychedelic Stealer malware.
The Psychedelic Stealer: When a CAPTCHA Becomes an Installer
Arctic Wolf Labs 2026.09.24 100% relevant
This article appears to be the first specific report establishing the Psychedelic Stealer campaign, including its delivery through compromised Ukrainian websites, its ClickFix-style social engineering, and the stealer's capabilities.
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