*是一种基于远程控制的病毒程序，该程序具有很强的隐蔽性和危害性，它可以在人不知鬼不觉的状态下控制你或者监视你。-Trojan is a remote control based on the virus program, which is very subtle and menacing. It may wonder Sticking to the state under the control you or watch you.

　Byshell是一个无进程、无DLL、无启动项的、集多种Rootkit技术特征的独立功能远程控制后门程序(Backdoor)。其利用线程注射DLL到系统进程，解除DLL映射并删除自身文件和启动项，关机时恢复。它是内核级的*程序，主要部分工作在Ring0，因此有很强的隐蔽性和杀伤力。-Byshell is a no process, no DLL, no startup items, the collection features a variety of Rootkit technology