Troj/Bckdr-QPC

Please follow the instructions for removing Trojans.

When first run Troj/Bckdr-QPC copies itself to:

<Startup>\userinit.exe
<User>\svchost.exe
<System>\drivers\services.exe

and creates the following files:

<User>\explorer.dll
<User>\ms_tcp.dll
<System>\explorer.dll
<System>\ms_tcp.dll

The files <System>\explorer.dll and <User>\explorer.dll are detected as Troj/Spy-AT and the files <System>\ms_tcp.dll and <User>\ms_tcp.dll are detected as Troj/Agent-HMB.

The following registry entries are created to run Troj/Bckdr-QPC on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
[system]
<System>\drivers\services.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
winlogon
<User>\svchost.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
[system]
<System>\drivers\services.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
winlogon
<User>\svchost.exe

The following registry entry is changed to run Troj/Bckdr-QPC on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
Userinit
<System>\userinit.exe,<System>\drivers\services.exe

The file <System>\drivers\services.exe is registered as a service named "Schedule" (replacing any existing services named "Schedule"). Registry entries are created or modified under:

HKLM\SYSTEM\CurrentControlSet\Services\Schedule

The following registry entry is set:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
UIHost
logonui.exe