Microsoft links Chinese group to hacks targeting systems used by military contractors, think tanks

A Chinese hacking group is exploiting flaws in Microsoft Exchange servers to target email systems used by a wide range of organizations, including military contractors and think tanks, according to Microsoft.

In a March 2 blog post, the company confirmed it had detected "multiple 0-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks." A "0-day exploit" refers to a previously undetected vulnerability in a computer system.

The attackers used the flaws...