Kali365: A New Phishing Threat Targeting Microsoft 365 Users
In April 2026, the FBI identified 'Kali365,' a Phishing-as-a-Service platform that enables attackers to hijack Microsoft 365 accounts by exploiting the OAuth device code authentication flow. This method allows cybercriminals to bypass multi-factor authentication (MFA) by capturing access and refresh tokens, granting persistent access to services like Outlook, Teams, and OneDrive without requiring user credentials. The attack typically involves phishing emails that direct victims to enter a device code on a legitimate Microsoft login page, unknowingly authorizing the attacker’s device. ([ic3.gov](https://www.ic3.gov/PSA/2026/PSA260521?pubDate=20260525&utm_source=openai)) The emergence of Kali365 underscores a significant shift in phishing tactics, highlighting the vulnerabilities in current authentication processes. As attackers increasingly adopt such sophisticated methods, organizations must reassess and strengthen their security protocols to mitigate the risks associated with token-based authentication exploits.
Kill Chain
