Troj/Haxdoor-BN

Please follow the instructions for removing Trojans.

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

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

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

<Windows system folder>\fux87.ini
<Windows system folder>\klgcptini.dat
<Windows system folder>\sd.dll
<Windows system folder>\sd.sys
<Windows system folder>\xptpmm.sys
<Windows system folder>\xptptt.dll

The files sd.dll, sd.sys, xptpmm.sys and xptptt.dll are detected as Troj/Haxdor-Fam.

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

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

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\xptptt
Startup
MmPageScan

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

The file xptpmm.sys is registered as a new system driver service named "xptpmm", with a display name of "XPPTP 0x24 winsock". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\xptpmm\

The file xptpmm.sys is registered as a new system driver service named "xptptt", with a display name of "XPPTP 0x25 winsock" and a startup type of automatic, so that it is started automatically during system startup. Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\xptptt\