Attackers Are Turning Microsoft’s Trusted Login System Into Their Latest Phishing Weapon

Attackers are increasingly abandoning fake Microsoft login pages in favor of abusing Microsoft’s legitimate authentication infrastructure, allowing phishing campaigns to bypass many of the warning signs employees have been trained to recognize. Starting on June 25th through the second week of July, we identified more than 200 phishing emails targeting users across approximately 120 organizations, spanning a wide range of industries and countries worldwide. The messages impersonated Microsoft Teams task notifications from HR and directed recipients to a legitimate Microsoft sign-in page.