Microsoft blames Chinese hacking group for attacks on Exchange Server

Microsoft has blamed a state-sponsored hacking group from China for a series of attacks on the company’s Exchange Server product, which is used to deliver email, calendaring, contact, scheduling, and collaboration services.

From a group Microsoft has dubbed Hafnium, the attacks target versions of Exchange Server operated on-premises at organizations instead of the Microsoft 365 cloud-based version.

Hafnium is a “highly skilled and sophisticated actor” that targets organizations in the United States to steal information, Tom Burt, Microsoft’s corporate vice president for customer security and trust, wrote in a March 2 blog post. Among the organizations targeted by the group
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