オンプレミスのExchangeServerソフトウェアを標的
【外部リンク】
https://blogs.microsoft.com/on-the-issues/2021/03/02/new-nation-state-cyberattacks/
New nation-state cyberattacks
https://msrc-blog.microsoft.com/2021/03/02/multiple-security-updates-released-for-exchange-server/
Multiple Security Updates Released for Exchange Server
