Rootkits get better at hiding | Tech News on ZDNet
For More info clcik on above link

A new Trojan horse is so good at hiding itself that some security researchers claim a new chapter has begun in their battle against malicious-code authors.

The new pest, dubbed “Rustock” by Symantec and “Mailbot.AZ” by F-Secure, uses “rootkit” techniques crafted to avoid the detection technology used by security software, Symantec and F-Secure said in recent analyses.