Backdoor.Masteseq.a:

startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run "l3dfx" 

dropped files:
c:\WINDOWS\SYSTEM\jpglog.apl 
c:\WINDOWS\SYSTEM\l3dfx.exe 
c:\WINDOWS\SYSTEM\winvcl.bin 
c:\WINDOWS\TEMP\temp_6639358.bat