A group in northern Yemen ran multiple Claude instances to write, research and review guidance software for weapons including a ballistic missile with a range goal exceeding 2,000 km, Anthropic said in a threat intelligence report released Thursday. The group tested a guided rocket that apparently failed, then returned to Claude within hours to analyze the failure. Operators bypassed safeguards by concealing the intended use and splitting work across sessions. Anthropic banned the accounts and found no evidence of an operational weapon, but said the group had assembled an offline toolkit that no longer needed Claude.
The report also described state surveillance, influence campaigns and cyberattacks. Anthropic said actors linked to Iran used Claude to develop targeting recommendations against US naval forces and domestic surveillance tools, while a UAE-linked influence operation produced material for about 300 fake accounts. A Russian espionage group used AI agents to modify malware after security tools detected it. Anthropic also blocked biological research that could support weapons development, though it could not determine whether the work was legitimate or malicious. The compa
Key sources
- SOURCE@afp“Anthropic says it has shut down multiple cases of state-sponsored surveillance operations that used its AI models.”x.com
- SUPPORT@cnbc“Anthropic said it detected and disrupted unauthorized large-scale efforts by China-based AI labs including Alibaba, Moonshot and DeepSeek to train their models using Claude.”x.com
- SUPPORT@clashreport“Anthropic says Moonshot generated 23M+ Claude exchanges from May–July 2026 through 5,380 allegedly fraudulent accounts.”x.com
- SUPPORT@clashreport“Anthropic says there's no evidence they fielded an operational weapon — but they already had an offline toolkit that no longer needed Claude.”x.com
- SUPPORT@marcowenjones“Anthropic's latest report on detecting misuse of AI contains this case of an anti-Muslim Brotherhood campaign by the UAE. It includes a sockpuppet network of 300 accounts.”x.com
- SUPPORT@marionawfal“Anthropic tied other accounts to Iranian state-aligned institutions running "soft war" and "cognitive warfare" campaigns, using Claude to build fake personas, target databases, campaign plans and social-media content in 20 languages.”x.com
- SUPPORT@lukolejnik“A Russian espionage group had AI agents check if security tools had caught its malware, then rebuild it until they hadn't.”x.com
- SUPPORT@deitaone“CHINA FOREIGN MINISTRY, ON ANTHROPIC ACCUSING CHINA AI LABS OF TARGETING CLAUDE: WE FIRMLY OPPOSE 'DISTORTION OF FACTS' AND SMEAR ATTACKS AGAINST CHINA”x.com