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Trojan.MulDrop.35810
Added to the Dr.Web virus database:
2013-08-01
Virus description added:
2013-08-02
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\SharedTaskScheduler] '{50E226CF-4943-4D94-9EEE-24BBDF75C7A8}' = 'ccoyfile.dll'
Creates the following services:
[<HKLM>\SYSTEM\ControlSet001\Services\mfcLib] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\winhelp] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
'%PROGRAM_FILES%\Microsoft Office\SYSTEM\sysbar.exe'
'%TEMP%\IExplorer.exe'
'<SYSTEM32>\winhelp.exe'
'%PROGRAM_FILES%\WindowsUpdate\zybdc.exe' lnk nothing
'<SYSTEM32>\mfclib.exe'
'%TEMP%\001.exe'
'%TEMP%\Alexa.exe'
'%TEMP%\player010.exe'
'%TEMP%\small.exe'
'%TEMP%\yoyo1243.exe'
Executes the following:
'<SYSTEM32>\cmd.exe' /c afc9fe2f418b00a0.bat
'%PROGRAM_FILES%\Internet Explorer\IEXPLORE.EXE' http://www.ku##5.com/#a27062
'<SYSTEM32>\at.exe' /delete /yes
'<SYSTEM32>\regsvr32.exe' /s <SYSTEM32>\ccoyfile.dll
'<SYSTEM32>\rundll32.exe' fly1819.dll , InstallMyDll
Modifies settings of Windows Explorer:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoInternetIcon' = '00000001'
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system :
Creates the following files:
%HOMEPATH%\Start Menu\Programs\Internet Explorer.lnk
%ALLUSERSPROFILE%\Start Menu\Internet Explorer.lnk
%HOMEPATH%\Favorites\ґґТµЧКС¶јУГЛЈ[ґґТµЧКС¶-ЦР№ъґґТµГЕ»§НшХѕ].url
%ALLUSERSPROFILE%\Start Menu\Programs\Internet Explorer.lnk
%HOMEPATH%\Desktop\Internet Explorer.lnk
%PROGRAM_FILES%\WindowsUpdate\zybdc.exe
%HOMEPATH%\Start Menu\Internet Explorer.lnk
%APPDATA%\Microsoft\Internet Explorer\Quick Launch\Internet Explorer.lnk
%HOMEPATH%\Favorites\їб256НшЦ·ґуИ«--ВМЙ«НшЦ·--ЦР№ъЧоЧЁТµµДНшЦ·µјєЅ.url
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\2VAZY7AN\ku255[1]
%TEMP%\usrinit_t.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\YPORKZYZ\lin[1].htm
<SYSTEM32>\Web.ini
%HOMEPATH%\Desktop\7k7kРЎУОП·.lnk
%HOMEPATH%\Favorites\РЎУОП·,ФЪПЯРЎУОП·,Л«ИЛРЎУОП·,7k7kРЎУОП·.url
%TEMP%\3596799a1543bc9f.aqq
%TEMP%\afc9fe2f418b00a0.bat
%WINDIR%\1.tmp
%TEMP%\small.exe
%TEMP%\Alexa.exe
<SYSTEM32>\fly1819.dll
<SYSTEM32>\67-105-7163
%TEMP%\IExplorer.exe
%TEMP%\yoyo1243.exe
%TEMP%\001.exe
%TEMP%\player010.exe
<SYSTEM32>\dllcache\fly1819.dll
<SYSTEM32>\mfclib.exe
%HOMEPATH%\Local Settings\Temporary Internet Files\_inimac
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\ver10[1].txt
%HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\dll[1].aspx
%TEMP%\nsi3.tmp\System.dll
<SYSTEM32>\ccoyfile.dll
<SYSTEM32>\winhelp.exe
%PROGRAM_FILES%\Microsoft Office\SYSTEM\34.exe
Sets the 'hidden' attribute to the following files:
%PROGRAM_FILES%\WindowsUpdate\zybdc.exe
Deletes the following files:
%APPDATA%\Microsoft\Internet Explorer\Quick Launch\Internet Explorer.lnk
%HOMEPATH%\Desktop\Internet Explorer.lnk
%HOMEPATH%\Desktop\7k7kРЎУОП·.lnk
%ALLUSERSPROFILE%\Start Menu\Programs\Internet Explorer.lnk
%ALLUSERSPROFILE%\Start Menu\Internet Explorer.lnk
%HOMEPATH%\Start Menu\Internet Explorer.lnk
%WINDIR%\1.tmp
%TEMP%\nsi3.tmp\System.dll
%WINDIR%\winhelp.exe
%TEMP%\small.exe
%TEMP%\3596799a1543bc9f.aqq
%PROGRAM_FILES%\Microsoft Office\SYSTEM\sysbar.exe
Moves the following files:
from %PROGRAM_FILES%\Microsoft Office\SYSTEM\34.exe to %PROGRAM_FILES%\Microsoft Office\SYSTEM\sysbar.exe
Network activity:
Connects to:
'co####.hao123soso.cn':80
'localhost':1056
'localhost':1054
'www.su###qqface.com':80
'localhost':1063
'www.ku##5.com':80
'12#.#24.9.120':80
'localhost':8389
'localhost':1035
'ad.##595.com':80
'88#.#43call.cn':80
'aa#.#x008.cn':7080
TCP:
HTTP GET requests:
ad.##595.com/count/count.asp?sz###################################################################################################################################################################################################
co####.hao123soso.cn/count/count.asp?sz########################################################################################################################################################################################################
www.ku##5.com/
12#.#24.9.120/dll.aspx?ti#######################################################################################################################################################
12#.#24.9.120/ver/ver10.txt
88#.#43call.cn/pw.ini
HTTP POST requests:
www.su###qqface.com//lin//lin.asp
UDP:
DNS ASK co####.hao123soso.cn
DNS ASK www.ku##5.com
DNS ASK www.su###qqface.com
DNS ASK re####e.51edm.net
DNS ASK aa#.#x008.cn
DNS ASK 88#.#43call.cn
DNS ASK ad.##595.com
Miscellaneous:
Searches for the following windows:
ClassName: 'MS_WebcheckMonitor' WindowName: '(null)'
ClassName: '' WindowName: '(null)'
ClassName: 'IEFrame' WindowName: '(null)'
ClassName: 'EDIT' WindowName: '(null)'
ClassName: 'Shell_TrayWnd' WindowName: '(null)'
ClassName: 'MS_AutodialMonitor' WindowName: '(null)'
Curing recommendations
Windows
macOS
Linux
Android
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 .
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.
Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.
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.
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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