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BackDoor.IRC.Bot.1986

Added to the Dr.Web virus database: 2012-09-18

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Media Home' = '<SYSTEM32>\wmpkh64.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\~Restore.{645FF040-5081-101B-9F08-00AA002F954E}\res-p0391726.id
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile\AuthorizedApplications\List] '<SYSTEM32>\wmpkh64.exe' = '<SYSTEM32>\wmpkh64.exe:*:Enabled:Windows Media Home'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\wmpkh64.exe' = '<SYSTEM32>\wmpkh64.exe:*:Enabled:Windows Media Home'
Creates and executes the following:
  • <SYSTEM32>\wmpkh64.exe <Full path to virus>
Executes the following:
  • <SYSTEM32>\net.exe stop OutpostFirewall
  • <SYSTEM32>\net1.exe stop ekrn
  • <SYSTEM32>\sc.exe delete ekrn
  • <SYSTEM32>\sc.exe stop OutpostFirewall
  • <SYSTEM32>\sc.exe delete OutpostFirewall
  • <SYSTEM32>\net1.exe stop OutpostFirewall
  • <SYSTEM32>\sc.exe config OutpostFirewall start= disabled
  • <SYSTEM32>\sc.exe config ekrn start= disabled
  • <SYSTEM32>\sc.exe stop NOD32krn
  • <SYSTEM32>\sc.exe config NOD32krn start= disabled
  • <SYSTEM32>\net.exe stop NOD32krn
  • <SYSTEM32>\net1.exe stop NOD32krn
  • <SYSTEM32>\sc.exe stop ekrn
  • <SYSTEM32>\net.exe stop ekrn
  • <SYSTEM32>\sc.exe delete NOD32krn
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
Searches for windows to
detect analytical utilities:
  • ClassName: 'PROCMON_WINDOW_CLASS' WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
detect programs and games:
  • ClassName: 'gdkWindowToplevel' WindowName: 'The Wireshark Network Analyzer'
Hides the following processes:
  • <Full path to virus>
  • <SYSTEM32>\wmpkh64.exe
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\0xf2[1].txt
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\0xf2[1].zip
  • <SYSTEM32>\wmpkh64.exe
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\wmpkh64.exe
Deletes itself.
Network activity:
Connects to:
  • '45.##.235.77':6303
  • '20#.#1.237.59':80
  • '1.##6.35.98':80
  • '45.##.235.76':51601
TCP:
HTTP GET requests:
  • 20#.#1.237.59/aspnet_client/ip/0xf2.txt
  • 1.##6.35.98/css/0xf2.zip
UDP:
  • DNS ASK na########.level14-c01-as86179.su
  • DNS ASK na#######.level14-c01-as86179.su
  • DNS ASK jm########02.level7-co2-as86409.su
Miscellaneous:
Searches for the following windows:
  • ClassName: 'TCPViewClass' WindowName: ''
  • ClassName: '#32770' WindowName: 'Regshot 1.8.2'
  • ClassName: 'PROCEXPL' WindowName: ''
  • ClassName: 'CNetmonMainFrame' WindowName: 'Microsoft Network Monitor 3.3'
  • ClassName: 'SmartSniff' WindowName: 'SmartSniff'
  • ClassName: 'CurrPorts' WindowName: 'CurrPorts'

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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Download by serial number

Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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Download by serial number

  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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