A fake Claude desktop application is being used to distribute RevStealer, a Windows malware strain built to steal crypto, password and browser data.

According to a Monday report by cybersecurity company Morphisec, RevStealer was previously distributed through GitHub repositories and game-cheat-themed sites but the most notable is a fake “Claude Opus 5 Free Desktop” project that impersonates AI developer Anthropic and promises free access to Claude. The researchers noted that the malware is designed to leave few traces and searches browser databases, cookies, password-manager records, VPN and remote-access settings, messaging data, screenshots and selected documents. RevStealer also targets over 50 cryptocurrency wallets.

The malware…