Troj/Apher-A is a Trojan which will download and install Troj/Death-25J.
Troj/Death-25J is a backdoor Trojan. When run the Trojan 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