Sophos

Troj/Haxdoor-CI

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Protection available since 20 June 2006 05:39:56 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

More Information

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

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

<System>\dxtpdh.sys
<System>\dxtpdx.dll
<System>\klgcptini.dat
<System>\ms87.dat
<System>\qz.dll
<System>\qz.sys

The files dxtpdh.sys and qz.sys are detected as Troj/Haxdor-Gen and the files dxtpdx.dll and qz.dll are detected as Troj/Haxdor-Fam.

The file ms87.dat may be safely deleted.

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

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

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\dxtpdx
Startup
DXImageDBG

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

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

HKLM\SYSTEM\CurrentControlSet\Services\dxtpdh\

The file dxtpdh.sys is registered as a new system driver service named "dxtpdx", with a display name of "MMX2 virtualization 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\dxtpdx\

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