Surge in Phishing Attacks Hijacking Legitimate Microsoft Communications

A KnowBe4 Threat Lab Publication
Authors: By James Dyer, Threat Intelligence Lead at KnowBe4 and Lucy Gee, Cybersecurity Threat Researcher at KnowBe4

On March 3, 2025, the KnowBe4 Threat Labs team observed a massive influx of phishing attacks originating from legitimate Microsoft domains.