Common Start Up Routines Of Trojan Viruses

• Autoexec.bat (MS-DOS)
  
• Win.ini
  

• System.ini
  

• c:\windows\winstart.bat
  
• Autostart folder
  (not often used by trojans, because it is to easy to look up and remove)
  
• Registry
  [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices] [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServicesOnce] [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce]
  [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run] [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce] [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunServices]
  
• c:\windows\wininit.ini