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

  • Pierluigi Paganini--Securityaffairs.com
  • published date: 2026-10-03 09:26:04 UTC

Cisco Talos details UAT-11587, a China-linked group using the Antino backdoor and Microsoft 365 as cover to spy on Asian governments. Cisco Talos has been tracking a cluster of espionage activity since September 2025 that it calls UAT-11587, and by July 2026 …

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