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(BackDoor-BAC.gen, Backdoor.Generic.3038, PSW.Generic2.EOE, TR/Spy.Goldu.FT.1.A, BackDoor-BAC.dll, Win32/Haxdoor, TR/Crypt.ULPM.Gen, Win32/Haxdoor!generic, BackDoor-BAC.sys, BKDR_Generic, PAK_Generic.001, BDS/Haxdoor.EB.2, BackDoor.Haxdoor.321,, Backdoor.Haxdoor.LL, Backdoor.Win32.Haxdoor.dw, BackDoor.Generic3.GEY, Backdoor:Win32/Haxdoor, Trojan-Droper.Win32.Goldun)

Virus description added:

Virus type: Program of remote administration

Size: 59051 bytes

Affected OS: Win95/98/NT/2k/XP/2k3

Packed by: FSG

Technical information

  • When backdoor starts, it creates the following files:
    %Windir%\System32\seppgs.dll, %Windir%\System32\zq.dll (39972 bytes, packed by UPX, are detected by Dr.Web antivirus as Backdoor.Haxdoor.320)
    %Windir%\System32\twpkbd.sys, %Windir%\System32\zq.sys (21856 bytes, packed by UPolyX, are detected by Dr.Web antivirus as Backdoor.Haxdoor.320).
  • To provide autorun to its modules, backdoor creates the following sections and system registry keys:
    HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\seppgm
  • Backdoor driver is installed as a service, which gives an opportunity to startup regardless of Windows reboot regime. For these the following keys are created in system registry:


    Service output names: "TCP x IP2 Kernel" и "TCP x IP2 Kernel32".

  • File seppgm.dll is injected into the memory of Explorer.exe process and into the memory of all started processes.
  • To bypass standard firewall Windows XP SP 2 the backdoor creates a key in registry:
    HKLM\SYSTEM\ControlSetXXX\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\%Windir%\Explorer.EXE: "%Windir%\Explorer.EXE:*:Enabled:explorer"
  • Deletes the following subsections in system registry:
    HKLM\SOFTWARE\Agnitum\Outpost Firewall
    HKLM\SOFTWARE\Agnitum\Outpost Firewall\Paths
  • To hide itself in the system, backdoor intercepts the following core functions:
  • Blocks the attempt to connect with files which contain the following strings in domain name:
  • Finishes such processes:


  • Contains functions of password stealing for WebMoney system, ICQ-messenger Miranda and Mirabilis ICQ.
  • Also backdoor has a function of system and accounts parameters stealing for further delivering to malefactor.
  • Curing recommendations

    1. If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
    2. If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.
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    After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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    1. If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
    2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
      • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
      • Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
      • Switch off your device and turn it on as normal.

    Find out more about Dr.Web for Android

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