If you are seeing a Spyware Alert box that stats that Worm.Win32.Netsky detected on your machine, then you have become infected with a trojan that uses this Spyware Alert to trick you into purchasing Advanced Virus Remover, Antivirus 2009 or another rogue antispyware program. Once running, the trojan will display a fake Security alert as

sshnas.dll or sshnas21.dll is a component of trojan FakeAlert. The trojan come from malicious websites that ask users to download an Adobe Flash Player update or player needed to view a movie online. The filename of the trojan is flash-HQ-plugin. Once started, the trojan will download and install core components: c.exe, msa.exe and sshnas.dll (sshnas21.dll).