In this attack, emails and documents from staff accounts were stolen.
This has included access to some of the companys source code repositories and internal systems.
To date we have found no evidence that Microsoft-hosted customer-facing systems have been compromised.
Our active investigations of Midnight Blizzard activities are ongoing, and findings of our investigations will continue to evolve.
We remain committed to sharing what we learn, Microsoft concluded.
source: www.techworm.net