一款小后门，主要功能是在对方主机开一个端口，调用系统cmd执行命令-one small back door, the main function of the other side hosts an open port, called the enforcement of the order system cmd

添加上线分组, 显示分组主机数量，修改了察看远程屏幕的位图设置-Adding on-line group, group show hosts, modify the look at remote screen bitmap setting