The hackers exploited a vulnerability which allowed web shells to be placed on systems which could act as back doors, allowing further exploitation. This was then exploited by other hacking groups, leaving systems vulnerable to criminals and ransomware attacks as well as espionage. The attack targeted Microsoft Exchange servers, affecting over a quarter of a million servers around the world. The cyber-attack on Microsoft Exchange Servers by Chinese state-backed groups was a reckless. Why are America companies targeted by “Russia” and “China” ?

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