说明：  见包名字就知道是什么了哦，对ENG好的人来说就是好东西
(Although they have been around for quite some time, rootkits have become somewhat of a buzzword in the security industry over the past year. While rootkits have traditionally been used by sophisticated attackers to hide their presence on compromised machines, recent worms, viruses, and trojans have started using them to complicate efforts to detect and clean infected machines. Microsoft recently reported that over twenty percent of the malware found by their malicious code removal tool on Windows XP Service Pack 2 machines contained rootkit technology [1]. By hiding the infection, rootkits allow the malicious software to remain on the system for a longer period of time. This enables the malicious software to steal more information, send out more spam, launch more DDOS attacks, and ultimately make more money for whoever is controlling it. Even some commercial software has adopted techniques used by rootkits for protection. The most famous example of this is the Sony Digital Ri)