09 May, 2026

Microsoft: Teams increasingly abused in helpdesk impersonation attacks

Microsoft is warning of threat actors increasingly abusing external Microsoft Teams collaboration and relying on legitimate tools for access and lateral movement on enterprise networks. The hackers impersonate IT or helpdesk staff to contact employees through cross-tenant chats and trick them into providing remote access for data theft purposes. Microsoft has observed multiple intrusions with […]

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Microsoft Teams phishing targets employees with A0Backdoor malware

Hackers contacted employees at financial and healthcare organizations over Microsoft Teams to trick them into granting remote access through Quick Assist and deploy a new piece of malware called A0Backdoor. The attacker relies on social engineering to gain the employee’s trust by first flooding their inbox with spam and then contacting them over Teams, pretending to […]

3 mins read