Trojan.DownLoader4.61648

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Control Panel\Desktop] 'SCRNSAVE.EXE' = '%PROGRAM_FILES%\Coopen\Coopen.scr'

Creates or modifies the following files:

%HOMEPATH%\Start Menu\Programs\Startup\CoopenІҐ·ЕЖч.lnk

Malicious functions:

Creates and executes the following:

%PROGRAM_FILES%\Coopen\CoopenAir.exe
%PROGRAM_FILES%\Coopen\Coopen.exe

Modifies file system :

Creates the following files:

%PROGRAM_FILES%\Coopen\image\Wallpaper\local wallpaper\ModeAList.ini
%PROGRAM_FILES%\Coopen\image\Wallpaper\coopen wallpaper\DefaultCoopenWallpaper.jpg
%PROGRAM_FILES%\Coopen\Coopen.scr
%PROGRAM_FILES%\Coopen\image\Wallpaper\local wallpaper\DefaultCoopenWallpaper.jpg
%PROGRAM_FILES%\Coopen\image\Wallpaper\coopen wallpaper\PicList.ini
%PROGRAM_FILES%\Coopen\image\Photo\local Photo\ModeBList.ini
%HOMEPATH%\Start Menu\Programs\Coopen\CoopenІҐ·ЕЖч.lnk
%PROGRAM_FILES%\Coopen\image\Photo\local Photo\B_0.jpg
%PROGRAM_FILES%\Coopen\image\Photo\local Photo\B_1.jpg
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\RadioC.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\RadioU.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Push_Confirm.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Push_Folder.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Synopsis1.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Synopsis1.ini
%PROGRAM_FILES%\Coopen\Templete\DefaultCoopenWallpaper.jpg
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\SkinClient.ini
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\SkinClose.ini
%PROGRAM_FILES%\Coopen\conf\MainParams
%PROGRAM_FILES%\Coopen\conf\ModeAChannelList.txt.bak
<SYSTEM32>\Coopen.scr
%PROGRAM_FILES%\Coopen\conf\Debug
%PROGRAM_FILES%\Coopen\image\Wallpaper\coopen wallpaper\todaypic\PicList.ini
%PROGRAM_FILES%\Coopen\conf\TodayInfo
%PROGRAM_FILES%\Coopen\image\Wallpaper\coopen wallpaper\todaypic\AdList.ini
%PROGRAM_FILES%\Coopen\Templete\Default.tpl
%PROGRAM_FILES%\Coopen\image\Wallpaper\coopen wallpaper\todaypic\PicList.txt
%PROGRAM_FILES%\Coopen\conf\%USERNAME%.ini
%TEMP%\nsl3.tmp\inetc.dll
%PROGRAM_FILES%\Coopen\uninst.exe
%PROGRAM_FILES%\Coopen\conf\All Users.ini
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\partnerDesk[1].txt
<SYSTEM32>\Coopen.inf
%PROGRAM_FILES%\Coopen\conf\Coopen.inf
%TEMP%\nsl3.tmp\SetIcon.ini
%HOMEPATH%\Desktop\Coopen.lnk
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Push_Config.png
%PROGRAM_FILES%\Coopen\conf\ModeAChannelList.txt
%PROGRAM_FILES%\Coopen\conf\ModeAChannelListReal.txt
%PROGRAM_FILES%\Coopen\CoopenActiveControl108.dll
%PROGRAM_FILES%\Coopen\licence.txt
%PROGRAM_FILES%\Coopen\conf\PluginConfig.ini
%PROGRAM_FILES%\Coopen\Templete\ModeB_logo.jpg
%PROGRAM_FILES%\Coopen\Templete\CoopenPhoto.jpg
%PROGRAM_FILES%\Coopen\Templete\ModeC.tpl
%PROGRAM_FILES%\Coopen\Templete\ModeB.tpl
%TEMP%\nsl3.tmp\System.dll
C:\CCPMachineInfo.dll
%TEMP%\coopen_setup_100217.exe
%TEMP%\nsl2.tmp
%TEMP%\nsl3.tmp\KillProcDLL.dll
%PROGRAM_FILES%\Coopen\CoopenAir.exe
%PROGRAM_FILES%\Coopen\CoopenMainManager.dll
%PROGRAM_FILES%\Coopen\Coopen.exe
%TEMP%\nsl3.tmp\install.bmp
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Indicator1.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Indicator2.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\CheckC.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\CheckU.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\MainIcon.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Progress.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Push_Cancel.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Message.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Notify.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Close.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Commit.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Background.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Channel.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Next.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Prev.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Widget.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Pause.png
%PROGRAM_FILES%\Coopen\Resource\SkinFormal\Button_Play.png

Sets the 'hidden' attribute to the following files:

%PROGRAM_FILES%\Coopen\conf\All Users.ini
%PROGRAM_FILES%\Coopen\conf\%USERNAME%.ini

Deletes the following files:

%TEMP%\nsl3.tmp\SetIcon.ini
%TEMP%\nsl3.tmp\System.dll
%PROGRAM_FILES%\Coopen\image\Wallpaper\coopen wallpaper\todaypic\PicList.txt
%TEMP%\nsl3.tmp\inetc.dll
%TEMP%\nsl3.tmp\install.bmp
%TEMP%\nsl3.tmp\KillProcDLL.dll

Network activity:

Connects to:

'xc###.coopen.cn':80
'se#.##nf.coopen.cn':80

TCP:

HTTP GET requests:

xc###.coopen.cn/108/PicList.aspx?sp############################################################################################################################################################################################################################
xc###.coopen.cn/GetPicInfo.aspx?cu#########################################################################################################################################################################################################################
se#.##nf.coopen.cn/partnerDesk.txt

UDP: