From gbhackers.com
A month after the discovery of the Solorigate hack, investors continue to unearth new facts about the attack, which goes on to show the sophistication and complexity of the attack.
Microsoft’s analysis of the attack reveals that the attackers are highly skilled operators who had put in a lot of time and effort to execute the attack and remain elusive while maintaining persistence.
The attackers appear to be very knowledgeable regarding operations security and performing malicious activity with a minimal footprint.