https://blog.wongcw.com/2018/12/27/%e7%95%b6%e5%bf%83%ef%bc%9a%e5%8b%92%e7%b4%a2%e7%97%85%e6%af%92wannacry%e4%bb%8d%e7%84%b6%e6%bd%9b%e8%97%8f%e5%9c%a8%e4%b8%96%e7%95%8c%e5%90%84%e5%9c%b0%e7%9a%84%e9%9b%bb%e8%85%a6%e4%b8%8a/