Troj/Death-25J is a backdoor Trojan which is dropped by Troj/Apher-A.
When the Trojan server program runs on a computer that computer is exposed to unauthorised access attacks from an intruder running the Trojan client program.
When run Troj/Death-25J will copy itself to C:\windows\system\vbwinsok.exe and set the following registry keys to point to this file:
HKLM\Software\Microsoft\Windows\CurrentVersion\Run\vbwinsok.exe HKCU\Software\Microsoft\Windows\CurrentVersion\Run\vbwinsok.exe