Russian state-backed hackers have been targeting Microsoft systems, the company announced in a blog update.
The company detected unauthorized activity from the group beginning in late November 2023. In February, the Russian state-sponsored actor ramped up its attacks tenfold from January when a "large volume" of cybersecurity issues emerged.
Members of Microsoft's senior leadership team and employees in cybersecurity, legal, and other functions were among the people whose email accounts were infiltrated, said a company filing with the SEC.