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Chinese Hackers Used Anthropic AI To Run Near-Fully Automated Cyberattacks

Photo by Julio Lopez / Unsplash

Anthropic revealed Thursday that suspected Chinese state-backed hackers used its AI coding agent, Claude Code, to automate a major cyber-espionage campaign, marking the first documented case of a foreign government using AI to autonomously run an entire hacking operation.

The attackers targeted roughly 30 global organizations — including tech firms, financial institutions, chemical manufacturers, and government agencies — and successfully breached several.

Anthropic said the hackers jailbroke Claude by disguising their instructions as defensive cybersecurity tasks and breaking malicious requests into smaller steps to bypass guardrails.

Once compromised, Claude scanned networks, wrote exploit code, harvested credentials, created backdoors, and generated detailed post-operation reports with minimal human oversight. The AI executed thousands of actions per second, far beyond human capability.

Anthropic banned the accounts, alerted victims, and notified authorities. The company warned that this type of AI-driven attack will likely spread, even to less sophisticated threat actors, as tools become more accessible.

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