# Microsoft Exposes Chinese State Actor's AI-Driven Cloud Breach Tactics

> Source: <https://osintsights.com/microsoft-exposes-chinese-state-actors-ai-driven-cloud-breach-tactics>
> Published: 2026-10-22 11:20:57+00:00

Microsoft uncovered a brazen AI-driven cloud breach by a Chinese state actor, who attempted to sign in to over 2,250 tenants at a staggering 2,900 attempts per minute - leaving defenders scrambling to keep up. The actor, tracked as Storm-0940, used a sophisticated AI-powered tool called ARTEX to automate and accelerate its attacks.

## Also reported by

- csoonline.com: China-linked hackers used agentic AI in attack on 2,250 Microsoft 365 tenants <https://www.csoonline.com/article/4239028/china-linked-hackers-used-agentic-ai-in-attack-on-2250-microsoft-365-tenants.html>