It is possible to remotely cause denial of service to any windows 95/NT user. It is done by sending OOB [Out Of Band] data to an established connection you have with a windows user. NetBIOS [139] seems to be the most effective since this is a part of Windows...
Backdoor.DeepThroat [Kaspersky]Backdoor/Deepthroat!Dropper [Computer Associates]BackDoor-J [McAfee]Bck/DeepThroat.Drp [Panda]destructive program [F-Prot]Nuker Program [Panda]Nuker.WinNuke.c [Kaspersky]Nuke-Winnuke [McAfee]security risk or a "backdoor
winnuke.exe