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Trojan.DownLoader6.44954

Added to the Dr.Web virus database: 2012-08-18

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'Cleanup' = 'C:\cleanup.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Persistence ! System' = '<Full path to virus>'
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\fennsxkv] 'Start' = '00000000'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:<Virus name>'
Creates and executes the following:
  • %TEMP%\gbieh.exe /nogui %TEMP%\KB2187450.txt
Executes the following:
  • <SYSTEM32>\netsh.exe firewall set logging droppedpackets = ENABLE
  • <SYSTEM32>\netsh.exe firewall set logging connections = ENABLE
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="Area de trabalho remota" protocol=TCP dir=in localport=3389 action=allow
  • <SYSTEM32>\netsh.exe firewall set notifications mode = ENABLE profile=all
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = TCP port=443 NAME="VPN006" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = TCP port=22 NAME="VPN007" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\netsh.exe firewall set opmode mode=ENABLE exceptions=enable profile=Standard
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN005" protocol=UDP dir=in localport=1701 action=allow
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN006" protocol=TCP dir=in localport=443 action=allow
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN007" protocol=TCP dir=in localport=22 action=allow
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN004" protocol=TCP dir=in localport=1723 action=allow
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN001" protocol=UDP dir=in localport=47 action=allow
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN002" protocol=UDP dir=in localport=500 action=allow
  • <SYSTEM32>\netsh.exe advfirewall firewall add rule NAME="VPN003" protocol=UDP dir=in localport=4500 action=allow
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = UDP port=1701 NAME="VPN005" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\reg.exe ADD "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\Licensing Core" /v EnableConcurrentSessions /d 1 /t REG_DWORD /f
  • <SYSTEM32>\reg.exe ADD "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v AutoAdminLogon /d 1 /t REG_SZ /f
  • <SYSTEM32>\reg.exe ADD "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v EnableConcurrentSessions /d 1 /t REG_DWORD /f
  • <SYSTEM32>\reg.exe ADD "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fSingleSessionPerUser /d 0 /t REG_DWORD /f
  • <SYSTEM32>\netsh.exe firewall add allowedprogram <Full path to virus> "<Virus name>"
  • <SYSTEM32>\cmd.exe /c <Current directory>\<Virus name>.bat
  • <SYSTEM32>\reg.exe ADD "HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /d 0 /t REG_DWORD /f
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = UDP port=500 NAME="VPN002" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = UDP port=4500 NAME="VPN003" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = TCP port=1723 NAME="VPN004" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = UDP port=47 NAME="VPN001" mode=ENABLE scope=ALL profile=ALL
  • <SYSTEM32>\reg.exe ADD "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v AllowMultipleTSSessions /d 1 /t REG_DWORD /f
  • <SYSTEM32>\reg.exe ADD "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services" /v MaxInstanceCount /d 10 /t REG_DWORD /f
  • <SYSTEM32>\netsh.exe firewall add portopening protocol = TCP port=3389 NAME="Area de trabalho remota" mode=ENABLE scope=ALL profile=ALL
Modifies file system :
Creates the following files:
  • <DRIVERS>\siqjr.sys
  • %PROGRAM_FILES%\ekdl.txt
  • %TEMP%\gbieh.exe
  • C:\zip.exe
  • %WINDIR%\pfirewall.log
  • C:\cleanup.exe
  • C:\cleanup.bat
  • <Current directory>\<Virus name>.bat
  • <Current directory>\ssleay32.dll
  • <Current directory>\libeay32.dll
  • %TEMP%\KB2187450.txt
  • %TEMP%\gbieh.zip
  • C:\termsrv.dll
  • C:\termsrv.zip
Sets the 'hidden' attribute to the following files:
  • <Full path to virus>
Deletes the following files:
  • %TEMP%\gbieh.zip
  • C:\termsrv.zip
Network activity:
Connects to:
  • 'bd#######r.basedatacenter.com':80
  • 'in#######er.basedatacenter.com':80
TCP:
HTTP GET requests:
  • bd#######r.basedatacenter.com/
  • in#######er.basedatacenter.com/
UDP:
  • DNS ASK bd#######r.basedatacenter.com
  • DNS ASK in#######er.basedatacenter.com

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.

Download Dr.Web

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