Anthropic says hackers used its software to attack financial firms and government agencies around world

A leading AI company claims to have stopped a China-backed “cyber espionage” campaign that was able to infiltrate financial firms and government agencies with almost no human oversight.

US-based Anthropic, said its coding tool, Claude Code, was “manipulated” by a Chinese state-sponsored group to attack 30 different entities around the world in September, achieving a “handful of successful intrusions”.

This was a “significant escalation” from previous AI-enabled attacks it monitored, it wrote in a blog post on Thursday, because Claude acted largely independently: 80 to 90% of the operations involved in the attack were performed without a human in the loop.

“The actor achieved what we believe is the first documented case of a cyber-attack largely executed without human intervention at scale,” it wrote.