Troj/Haxdoor-HM

Category: Viruses and Spyware Protection available since:15 Jun 2006 00:00:00 (GMT)
Type: Trojan Last Updated:15 Jun 2006 00:00:00 (GMT)
Prevalence: Small Number of Reports

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

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

Troj/Haxdoor-HM 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

Sophos's anti-virus products include Genotype™ detection technology, which can proactively protect against new threats without requiring an update. Sophos customers have been protected against components of the Troj/Haxdoor-HM (detected as Troj/Haxdor-Gen and Troj/Haxdor-Fam) since version 4.00. Troj/Haxdoor-HM is a Trojan for the Windows platform.

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

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

<System>\klgcptini.dat
<System>\ms87.dat
<System>\pptp16.dll
<System>\pptp24.sys
<System>\qz.dll
<System>\qz.sys

The files pptp16.dll and qz.dll are detected as Troj/Haxdor-Fam and the files pptp24.sys and qz.sys are detected as Troj/Haxdor-Gen.

The following registry entries are created to run code exported by pptp16.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\pptp16
DllName
pptp16.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\pptp16
Startup
KeImageDBG

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\pptp16
Impersonate
1

The file pptp24.sys is registered as a new system driver service named "pptp16", 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\pptp16\

The file pptp24.sys is registered as a new system driver service named "pptp24", with a display name of "MMX virtualization service". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\pptp24\

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