unit42.paloaltonetworks.com· Aug 31, 2026· by Noam Sala

Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams

Learn how the Spring Ring campaign abuses Microsoft Teams and voice phishing to deploy malware and target enterprise domain controllers. The post Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams appeared first on Unit 42.

🎯 Vulnerability: Web Security Vulnerability

💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.

#Malware#Threat Research#Cloaked Ursa#Entra ID#Microsoft Teams#payload#PowerShell#Remote Access Trojan

Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams

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