Troj/BDoor-AJK is a backdoor Trojan which allows a remote intruder to gain access and control over the computer.
When first run Troj/BDoor-AJK copies itself to <System>\vrex.exe.
The following registry entry is created to run vrex.exe on startup:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
vrex
<System>\vrex.exe
The file vrex.exe is registered as a new system driver service named "br3goeae", with a display name of "Print Spooler Service" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:
HKLM\SYSTEM\CurrentControlSet\Services\br3goeae