Trojan.DownLoader7.10710

Technical Information

To ensure autorun and distribution:

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\crd] 'Start' = '00000002'

Malicious functions:

Creates and executes the following:

%TEMP%\IXP001.TMP\poststp.exe /Service
%TEMP%\IXP001.TMP\poststp.exe
%PROGRAM_FILES%\MSN\MSNIA\msniasvc.exe /regserver
%TEMP%\IXP000.TMP\msninst.exe /Action:Wait
%TEMP%\IXP000.TMP\msnia.exe /Q:A
%TEMP%\IXP001.TMP\prestp.exe

Executes the following:

<SYSTEM32>\rundll32.exe advpack.dll,LaunchINFSection campaign.inf,DefaultInstall

Modifies file system :

Creates the following files:

%ALLUSERSPROFILE%\Desktop\MSN Installer.lnk
%PROGRAM_FILES%\MSN\MsnInstaller\SETE.tmp
%TEMP%\IXP001.TMP\msniasvc.exe
%TEMP%\IXP001.TMP\custdial.dll
%TEMP%\IXP001.TMP\unicows.dll
%PROGRAM_FILES%\MSN\MsnInstaller\SETD.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SET9.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SET8.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SETA.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SETC.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SETB.tmp
%TEMP%\IXP001.TMP\msncore.inf
%PROGRAM_FILES%\MSN\MSNIA\SET11.tmp
%PROGRAM_FILES%\MSN\MSNIA\SET10.tmp
%PROGRAM_FILES%\MSN\MSNIA\SET12.tmp
%PROGRAM_FILES%\MSN\MSNIA\SET14.tmp
<SYSTEM32>\SET13.tmp
%PROGRAM_FILES%\MSN\MSNIA\SETF.tmp
%TEMP%\IXP001.TMP\poststp.exe
%TEMP%\IXP001.TMP\prestp.exe
%TEMP%\IXP001.TMP\ADVPACK.DLL
%TEMP%\IXP001.TMP\W95INF16.DLL
%TEMP%\IXP001.TMP\W95INF32.DLL
%TEMP%\IXP000.TMP\install.mar
%TEMP%\IXP000.TMP\msdbxi.dll
%TEMP%\IXP000.TMP\msnitd.mar
%TEMP%\IXP000.TMP\msnia.exe
%TEMP%\IXP000.TMP\msnihc.mar
%TEMP%\IXP000.TMP\msnilc.dll
%TEMP%\IXP000.TMP\msnsusi.inf
%TEMP%\IXP000.TMP\MsnInst.dll
%TEMP%\IXP000.TMP\unicows.dll
%TEMP%\IXP000.TMP\msnsign.dll
%TEMP%\IXP000.TMP\msninst.exe
%TEMP%\IXP000.TMP\iasvcstb.dll
%PROGRAM_FILES%\MSN\MsnInstaller\SET4.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SET3.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SET5.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SET7.tmp
%PROGRAM_FILES%\MSN\MsnInstaller\SET6.tmp
%TEMP%\IXP000.TMP\W95INF16.DLL
%TEMP%\IXP000.TMP\msnms.ico
%TEMP%\IXP000.TMP\campaign.inf
%TEMP%\IXP000.TMP\msnsusiq.inf
%TEMP%\IXP000.TMP\W95INF32.DLL
%TEMP%\IXP000.TMP\ADVPACK.DLL

Moves the following files:

from %PROGRAM_FILES%\MSN\MsnInstaller\SETE.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msnms.ico
from %PROGRAM_FILES%\MSN\MSNIA\SETF.tmp to %PROGRAM_FILES%\MSN\MSNIA\msncore.inf
from %PROGRAM_FILES%\MSN\MsnInstaller\SETC.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\iasvcstb.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SETD.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msnsusi.inf
from %PROGRAM_FILES%\MSN\MSNIA\SET10.tmp to %PROGRAM_FILES%\MSN\MSNIA\msniasvc.exe
from <SYSTEM32>\SET13.tmp to <SYSTEM32>\unicows.dll
from %PROGRAM_FILES%\MSN\MSNIA\SET14.tmp to %PROGRAM_FILES%\MSN\MSNIA\prestp.exe
from %PROGRAM_FILES%\MSN\MSNIA\SET11.tmp to %PROGRAM_FILES%\MSN\MSNIA\custdial.dll
from %PROGRAM_FILES%\MSN\MSNIA\SET12.tmp to %PROGRAM_FILES%\MSN\MSNIA\unicows.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SET5.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msninst.exe
from %PROGRAM_FILES%\MSN\MsnInstaller\SET6.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msnsign.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SET3.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msninst.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SET4.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\unicows.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SET7.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msnilc.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SETA.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msnitd.mar
from %PROGRAM_FILES%\MSN\MsnInstaller\SETB.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msnihc.mar
from %PROGRAM_FILES%\MSN\MsnInstaller\SET8.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\msdbxi.dll
from %PROGRAM_FILES%\MSN\MsnInstaller\SET9.tmp to %PROGRAM_FILES%\MSN\MsnInstaller\install.mar