免杀shellcode并绕过杀毒添加自启动

https://www.wtfsec.org/posts/%E5%85%8D%E6%9D%80shellcode%E5%B9%B6%E7%BB%95%E8%BF%87%E6%9D%80%E6%AF%92%E6%B7%BB%E5%8A%A0%E8%87%AA%E5%90%AF%E5%8A%A8/