A rootkit is a stealthy type of software, typically malicious, designed to hide the existence of certain processes or programs from normal methods of detection and enable continued privileged access to a computer. The term rootkit is a concatenation of ‘root’ (the traditional name of the privileged account on Unix operating systems) and the word ‘kit’ (which refers to the software components that implement the tool). The term ‘rootkit’ has negative connotations through its association with malware.

http://en.wikipedia.org/wiki/Rootkit

下面其中一个链结是暗黑安全联盟的网站。

供参考。