Biden Administration Blames Hackers Tied to China for Microsoft Cyberattack Spree

Four Chinese nationals were indicted over separate hacking activity; dozens of nations condemn Beijing’s state-sponsored hacking

Cybersecurity experts had been pressing the Biden administration to respond to China’s alleged involvement in the Microsoft email hack.

Photo: leah millis/Reuters
By

Dustin Volz

and

Aruna Viswanatha

WASHINGTON—The Biden administration publicly blamed hackers affiliated with China’s main intelligence service for a far-reaching cyberattack on Microsoft Corp. email software this year, part of a global effort by dozens of nations to condemn Beijing’s malicious cyber activities.

The U.S. government has high confidence that hackers tied to the Ministry of State Security, or MSS, carried out the unusually indiscriminate hack of Microsoft Exchange Server software that emerged in March, senior officials said.

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