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Antino Backdoor Lets China-Linked UAT-11587 Turn Microsoft 365 Into a C2 Channel

๐Ÿ“… October 4, 2026 ๐Ÿ“ฐ securityaffairs.com ๐Ÿ” 0 CVE(s) referenced

China-linked UAT-11587 used sophisticated phishing and the Rust-based Antino backdoor to spy on Asian governments while hiding command-and-control traffic inside trusted Microsoft 365 services.

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