Troj/Haxdoor-IN

Please follow the instructions for removing Trojans.

Troj/Haxdoor-IN is a Trojan for the Windows platform.

Troj/Haxdoor-IN runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer.

Troj/Haxdoor-IN includes functionality to:

- stealth its files, processes, registry entries and services
- prevent itself being terminated
- prevent itself being deleted
- disable other software, including anti-virus, firewall and security related applications

When Troj/Haxdoor-IN is installed the following files are created:

<System>\klgcptini.dat
<System>\qm.dll
<System>\qm.sys
<System>\sndu32.dll
<System>\sndu64.sys
<System>\stt82.ini

The files qm.dll, qm.sys, sndu32.dll and sndu64.sys are detected as Troj/Haxdor-Fam.

The files klgcptini.dat and stt82.ini can be deleted.

The following registry entries are created to run code exported by sndu32.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\sndu32
DllName
sndu32.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\sndu32
Startup
MMXChckIDT

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\sndu32
Impersonate
1

The file sndu64.sys is registered as a new system driver service named "sndu32", with a display name of "SoundDriver SDB32" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\sndu32\

The file sndu64.sys is registered as a new system driver service named "sndu64", with a display name of "SoundDriver SDB64". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\sndu64\