From Symantec ....
DeepThroat.Trojan has no visual indicators of infection. When executed, this Trojan horse modifies the system registry to enable itself to run as a service. When installed on a Microsoft Windows system, it lets others gain full access to the system through a network connection.
Also Known As:    Backdoor.deepthroat.b   
Type:    Trojan Horse
Infection Length:    Approximately 200 Kbytes (size may vary)
removal instructions
   1. Scan your computer with Norton AntiVirus.
   2. Restart your computer in MS-DOS mode.
   3. Delete any files detected by Norton AntiVirus as DeepThroat.Trojan.
   4. Restart the system.
   5. Edit the Windows registry using Regedit.exe. Go to the following registry key:
      HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
   6. On the right side of the window, look for the registry entry with SystemDLL32 as its name field. Right-click SystemDLL32 and click Delete.
   7. Restart the machine again, look at the registry, and make sure that the Trojan horse did not reinstall itself.
   8.
http://www.nsclean.com/psc-dt.html http://www.symantec.com/avcenter/venc/data/deepthroat.trojan.html