Microsoft said today that it was hacked by a "Russian state-sponsored actor" called Midnight Blizzard, also known as Nobelium. That's the same group of hackers suspected to be responsible for the major SolarWinds supply chain hack that occurred in 2020.
"Beginning in late November 2023, the threat actor used a password spray attack to compromise a legacy non-production test tenant account and gain a foothold, and then used the account’s permissions to access a very small percentage of Microsoft corporate email accounts, including members of our senior leadership team and employees in our cybersecurity, legal, and other functions, and exfiltrated some emails and attached documents," Microsoft wrote.
