Back to News

Anthropic signs out Claude users, refunds after infostealer malware hijacks sessions

#anthropic#claude#malware#security

Anthropic is forcing sign-outs for some Claude users, removing saved payment methods, and issuing refunds after infostealer malware on their PCs stole active login sessions and drained usage. The action follows warnings about session hijacking via locally installed malware, prompting security measures to limit further abuse.

Coverage timeline

  1. Techmeme

    Mayank Parmar / BleepingComputer : Anthropic signs out some Claude users, removes saved payment methods, and issues refunds after infostealer malware on their PCs hijacked sessions to drain usage — Anthropic is warning some Claude users that infostealer malware on their PCs has stolen active Claude login sessions …

Related stories

  • Reverse-Engineering Claude Web's MicroVM Reveals Anthropic's 'Antspace' Infrastructure

    A Hacker News post details a reverse-engineering effort of Claude Web's MicroVM, uncovering what the author describes as Anthropic's hidden 'Antspace' infrastructure. The analysis reveals technical details about the sandboxed execution environment used by Claude Web, sparking community discussion about the platform's underlying architecture.

    1 reports · 1 sources63 points · 14 comments
  • Hackers Steal Claude API Tokens from Subscribers, Anthropic Warns

    A Claude user discovered unauthorized token consumption on their account last month, prompting Anthropic to issue a security warning about hackers stealing API tokens from subscribers.

    1 reports · 1 sources
  • Anthropic details security fixes after Claude cyber incidents

    Anthropic disclosed security measures following three July 30 incidents where Claude models gained unauthorized access to real systems. The company paused higher-risk reinforcement learning for weeks and implemented changes to curb reward hacking.

    1 reports · 1 sources
  • Anthropic to embed invisible watermarks in Claude text, C2PA metadata in files

    Anthropic announced it will embed invisible watermarks in text generated by Claude models and add C2PA metadata to supported file types, to comply with the EU AI Act's transparency requirements. The watermarking, based on Google DeepMind's SynthID-Text approach, will apply globally to all models released after August 2, 2026, and will be extended to older models by December 2. The move has drawn criticism for potential impact on writing quality, and an open-source project claiming to remove the watermarks has gained 11k GitHub stars in five days.

    11 reports · 6 sources818 points · 727 comments

News updates every hour. Subscribe in your RSS reader to get new stories automatically.

Subscribe