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Trojan.DownLoader5.1437

Added to the Dr.Web virus database: 2011-10-07

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates or modifies the following files:
  • %WINDIR%\Tasks\SA.DAT
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\Schedule] 'Start' = '00000002'
  • [<HKLM>\SYSTEM\ControlSet001\Services\mtsodfdss] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
  • <SYSTEM32>\Macromadendt\cflpsv.exe  /service
  • <SYSTEM32>\Macromadendt\MsShellExt\filpsy.exe 
  • <SYSTEM32>\NteofSys\Setup.exe 297
Executes the following:
  • <SYSTEM32>\at.exe 7:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 7:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 8:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 8:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 8:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 6:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 5:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 6:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 7:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 6:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 9:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 11:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 11:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 11:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 12:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 12:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 9:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 9:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 10:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 10:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 10:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 0:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 0:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 1:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 1:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 1:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\net1.exe start mtsodfdss
  • <SYSTEM32>\regsvr32.exe "<SYSTEM32>\NteofSys\ThunderWeb.dll" /s
  • <SYSTEM32>\sc.exe config Schedule start= AUTO
  • <SYSTEM32>\at.exe 0:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\net1.exe start Schedule
  • <SYSTEM32>\at.exe 2:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 4:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 4:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 4:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 5:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 5:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 2:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 2:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 3:00 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 3:30 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
  • <SYSTEM32>\at.exe 3:15 /every:M,T,W,Th,F,S,Su "<SYSTEM32>\Macromadendt\filpsy.exe"
Modifies file system :
Creates the following files:
  • <SYSTEM32>\Macromadendt\MsShellExt\fxdapta.ini
  • <SYSTEM32>\NteofSys\tlk.dll
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\ifcab[1].htm
  • <SYSTEM32>\Macromadendt\MsShellExt\mseumdata.ini
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\gt[1].asp
  • <SYSTEM32>\NteofSys\ntetask.txt
  • <SYSTEM32>\NteofSys\ThunderWeb.dll
  • <SYSTEM32>\NteofSys\Setup.exe
  • <SYSTEM32>\NteofSys\ntemain.txt
  • <SYSTEM32>\NteofSys\ntesys.ini
  • <SYSTEM32>\NteofSys\ntesvc.txt
Deletes the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\ifcab[1].htm
  • <SYSTEM32>\Macromadendt\MsShellExt\fxdapta.ini
Network activity:
Connects to:
  • 'rw.###lhappy.info':80
TCP:
HTTP GET requests:
  • rw.###lhappy.info/page/gt.asp?ve#################################################################################################################################
  • rw.###lhappy.info/page/ifcab.htm
UDP:
  • DNS ASK rw.###lhappy.info
  • '<Private IP address>':1034
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''

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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    • 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.

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