I wonder what they found.

This is the best summary I could come up with:

On Friday, Microsoft disclosed that the hacking group it calls Midnight Blizzard, also known as APT29 or Cozy Bear — and widely believed to be sponsored by the Russian government — hacked some corporate email accounts, including those of the company’s “senior leadership team and employees in our cybersecurity, legal, and other functions.”

“The investigation indicates they were initially targeting email accounts for information related to Midnight Blizzard itself,” the company wrote in a blog post and SEC disclosure.

Microsoft did not disclose how many email accounts were breached, nor exactly what information the hackers accessed or stole.

Microsoft took advantage of news of this hack to talk about how they are going to move forward to make itself more secure.

“This will likely cause some level of disruption while we adapt to this new reality, but this is a necessary step, and only the first of several we will be taking to embrace this philosophy.”

APT29, or Cozy Bear, is widely believed to be a Russian hacking group working responsible for a series of high-profile attacks, such as those against SolarWinds in 2019, the Democratic National Committee in 2015, and many more.

The original article contains 345 words, the summary contains 193 words. Saved 44%. I’m a bot and I’m open source!

I guess the break-in was primarily caused by the victim using Windows, Office, and Exchange.