Customer Guidance on Recent Nation-State Cyber Attacks – Microsoft Security Response Center
Note: we are updating as the investigation continues. Revision history listed at the bottom. This post contains technical details about the methods of the actor we believe was involved in Recent Nation-State Cyber Attacks, with the goal to enable the broader security community to hunt for activity in their networks and contribute to a shared defense against this sophisticated threat actor. Please see the Microsoft Product Protections and Resources section for additional investigative updat...
Solarwinds Orion Directory Federation Services Backdoor Fireeye Inc Applications Or Service Principals Exchange Online Application Or Service Principal
Source: microsoft.com