https://blog.wongcw.com/2021/09/02/%e7%be%8e%e5%9c%8bvmshell-inc%e6%8e%a8%e5%87%ba%e4%b8%89%e7%b6%b2gia%e7%b7%9a%e8%b7%af%e6%bb%bf%e8%b6%b3%e9%ab%98%e7%ab%af%e7%a9%a9%e5%ae%9a%e5%ae%a2%e6%88%b6%e9%a6%99%e6%b8%afcmi%e5%b9%b4%e4%bb%988/