Symantec Security Response - W32.Netsky@mm Removal Tool:
"Symantec Security Response has developed a removal tool to clean infections of the following Netsky variants.

W32.Netsky.B@mm
W32.Netsky.C@mm
W32.Netsky.D@mm
W32.Netsky.E@mm
W32.Netsky.K@mm"

http://securityresponse.symantec.com/avcenter/venc/data/w32.netsky@mm.removal.tool.html