Anthropic Warns Claude Users About Infostealer Malware

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Anthropic has warned some Claude AI users about infostealer malware infections that may have allowed attackers to hijack login sessions, consume usage limits, and make unauthorized charges. In this episode, we explain how malware such as Vidar, Lumma, StealC, RedLine, Acreed, and Atomic Stealer can steal passwords, browser cookies, and active sessions—and how attackers reportedly used stolen Claude credentials. Learn what Anthropic did to protect affected accounts, why payment methods were removed, and what users should do before restoring payment information. A crucial cybersecurity warning for Claude users, AI users, and anyone concerned about account security.