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Chinese APT UNC5221 Deploys New Malware for M365 Persistence
Chinese APT UNC5221 leverages new malware, Plenet and AgentPSD, alongside Brickstorm backdoor to maintain persistent access in compromised Microsoft 365 environments for
Microsoft Teams and Office Web File Access Disruptions - Mitigation Guide
Microsoft is investigating a service incident impacting file access in Teams and Office for the web, causing operational delays for global enterprises.
BlackFile: Analyzing UNC6671 Vishing & Cloud Data Extortion
Examines UNC6671's BlackFile vishing, AiTM, and cloud data exfiltration tactics against Microsoft 365 & Okta. Actionable mitigations included.
Microsoft Teams Free Backend Change Disrupts Chat and Calling
Microsoft confirms a backend configuration change has broken core functionality for Microsoft Teams Free users, impacting global business communication.
Microsoft Teams Abused in Helpdesk Impersonation Attacks: TTPs & Mitigations
Microsoft warns of helpdesk impersonation attacks via Teams external collaboration. Understand TTPs for initial access, lateral movement, and critical mitigation
APT28 FrostArmada DNS Hijack Campaign Steals Microsoft 365 Logins
Authorities disrupt APT28's FrostArmada campaign, which used DNS hijacking of MikroTik and TP-Link routers to steal Microsoft 365 account credentials.
Exchange Online Service Change: Solving Outlook for Mac Access Issues
Microsoft addresses a service disruption in Exchange Online caused by virtual account updates affecting Outlook for Mac and mobile device connectivity.
Microsoft Investigates Classic Outlook Sync & Connection Issues
Microsoft is actively investigating widespread classic Outlook desktop client synchronization and connectivity problems impacting users globally.