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June 15, 2006



Haxdoor is a powerful backdoor with rootkit capabilities. It can hide its presence (processes and files) on an infected system so that it can be only detected using either anti-virus with kernel drivers or a rootkit detector. This backdoor has spying capabilities and it has lately been used to steal bank-related information (logon and passwords for online bank accounts) and other information.

Disinfection & Removal

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For more general information on disinfection, please see Removal Instructions.

Technical Details

When the backdoor is executed, it drops the following files in the Windows System32 folder:

  • pptp16.dll
  • pptp24.sys
  • qz.dll
  • qz.sys

During the execution, it also creates the following registry keys:

  • HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\pptp16
  • HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\pptp16.sys
  • HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\pptp24.sys
  • HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\pptp16.sys
  • HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Network\pptp24.sys

The HKLM modification allows the backdoor to start when a user logs on. It also sets to '0' the value EnforceWriteProtection under the key:

  • HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory Management

thus disabling memory write protection for the computer.After this, it will start the following services that will also be automatically started every time that the system is booted:

  • MMX virtualization service
  • MMX2 virtualization service

Haxdoor is quite powerful and it is especially used to commit acts of economic fraud/theft, most of which are particularly targeted at Internet Explorer users. It targets several worldwide banks and financial services, both stealing account information and performing pharming.The following list is a sample of the banks included:

  • Alliance-leicester
  • Barclays
  • Cajamadrid
  • Deutsche-bank
  • E-Bullion
  • Firepay
  • Halifax
  • Lloyds
  • Mastercard
  • Paypal
  • Wellsfargo
  • Westernunion
  • Yambo Financials

The backdoor also features a generic mechanism for stealing account information. In addition to this, Haxdoor.M will redirect traffic from several security websites to a Microsoft website. The list of redirected URLs:

  • avp.ch
  • avp.com
  • avp.ru
  • awaps.net
  • customer.symantec.com
  • d-eu-1f.kaspersky-labs.com
  • d-eu-2f.kaspersky-labs.com
  • dispatch.mcafee.com
  • download.mcafee.com
  • downloads1.kaspersky-labs.com
  • downloads1.kaspersky-labs.com
  • downloads1.kaspersky-labs.com
  • downloads2.kaspersky-labs.com
  • downloads3.kaspersky-labs.com
  • downloads4.kaspersky-labs.com
  • downloads-us1.kaspersky-labs.com
  • downloads-us2.kaspersky-labs.com
  • downloads-us3.kaspersky-labs.com
  • d-ru-1f.kaspersky-labs.com
  • d-ru-2f.kaspersky-labs.com
  • d-us-1f.kaspersky-labs.com
  • engine.awaps.net
  • f-secure.com
  • ftp.avp.ch
  • ftp.downloads2.kaspersky-labs.com
  • ftp.f-secure.com
  • ftp.kaspersky.ru
  • ftp.kasperskylab.ru
  • ftp.sophos.com
  • ids.kaspersky-labs.com
  • kaspersky.com
  • kaspersky-labs.com
  • liveupdate.symantec.com
  • liveupdate.symantec.com
  • liveupdate.symantec.com
  • liveupdate.symantecliveupdate.com
  • liveupdate.symantecliveupdate.com
  • mast.mcafee.com
  • mcafee.com
  • my-etrust.com
  • networkassociates.com
  • phx.corporate-ir.net
  • rads.mcafee.com
  • securityresponse.symantec.com
  • service1.symantec.com
  • sophos.com
  • spd.atdmt.com
  • symantec.com
  • trendmicro.com
  • update.symantec.com
  • updates.symantec.com
  • updates1.kaspersky-labs.com
  • updates1.kaspersky-labs.com
  • updates2.kaspersky-labs.com
  • updates3.kaspersky-labs.com
  • updates3.kaspersky-labs.com
  • updates4.kaspersky-labs.com
  • updates5.kaspersky-labs.com
  • us.mcafee.com
  • virustotal.com

Additionally, the backdoor can steal the following info:

  • IMAP password
  • IMAP server name
  • IMAP user name
  • POP3 password
  • POP3 server name
  • POP3 user name

Haxdoor.M also includes older functionality in other variants already detected by F-Secure. Additional details can be found in the description for Haxdoor.


F-Secure Anti-Virus detects this malware with the following updates:

Detection Type: PC
Database: 2006-06-15_01

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