Millions of Microsoft users have been urged to remain vigilant after US federal investigators warned about a sophisticated cyberattack campaign known as 'Kali365', which allegedly allows hackers to bypass traditional Microsoft security protections and infiltrate accounts linked to Outlook, Teams, OneDrive, and other Microsoft 365 services.
The warning, highlighted in recent FBI and cybersecurity reports, centres on attackers exploiting legitimate Microsoft authentication systems rather than breaking through them directly.
