Follow:

 

BrowserModifier:Win32/CNNIC


BrowserModifier:Win32/CNNIC enables Chinese keyword searching in Internet Explorer and adds support for other applications to use Chinese domain names that registered with CNNIC (China Internet Network Information Center). This program is often installed as part of a shareware or freeware program, with or without user consent. BrowserModifier:Win32/CNNIC also contains a kernel driver that protects its files and registry settings from being modified or deleted. The program also includes automatic self-update functionality.


What to do now

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.

Threat behavior

BrowserModifier:Win32/CNNIC enables Chinese keyword searching in Internet Explorer and adds support for other applications to use Chinese domain names that registered with CNNIC (China Internet Network Information Center). This program is often installed as part of a shareware or freeware program, with or without user consent. BrowserModifier:Win32/CNNIC also contains a kernel driver that protects its files and registry settings from being modified or deleted. The program also includes automatic self-update functionality.
Installation
BrowserModifier:Win32/CNNIC may create the following files during installation:
 
%USERPROFILE%\local settings\temp\setup.exe
%USERPROFILE%\local settings\temp\setup\cdn.dll
%USERPROFILE%\local settings\temp\setup\cdndet.dll
%USERPROFILE%\local settings\temp\setup\cdnglo.dll
%USERPROFILE%\local settings\temp\setup\cdnins.dll
%USERPROFILE%\local settings\temp\setup\cdnprh.dll
%USERPROFILE%\local settings\temp\setup\cdnprot.sys
%USERPROFILE%\local settings\temp\setup\cdnspie.dll
%ProgramFiles%\cnnic\cdn\cdn.dll
%ProgramFiles%\cnnic\cdn\cdnaux.dll
%ProgramFiles%\cnnic\cdn\cdncmd.dll
%ProgramFiles%\cnnic\cdn\cdncol.dll
%ProgramFiles%\cnnic\cdn\cdnctr.exe
%ProgramFiles%\cnnic\cdn\cdndet.dll
%ProgramFiles%\cnnic\cdn\cdndrag.dll
%ProgramFiles%\cnnic\cdn\cdnforie.dll
%ProgramFiles%\cnnic\cdn\cdnglo.dll
%ProgramFiles%\cnnic\cdn\cdnins.dll
%ProgramFiles%\cnnic\cdn\cdnns.dll
%ProgramFiles%\cnnic\cdn\cdnprh.dll
%ProgramFiles%\cnnic\cdn\cdnprot.sys
%ProgramFiles%\cnnic\cdn\cdnrenew.exe
%ProgramFiles%\cnnic\cdn\cdnsign.dll
%ProgramFiles%\cnnic\cdn\cdnspie.dll
%ProgramFiles%\cnnic\cdn\cdnswp.exe
%ProgramFiles%\cnnic\cdn\cdntdns.dll
%ProgramFiles%\cnnic\cdn\cdnuc.exe
%ProgramFiles%\cnnic\cdn\cdnunins.exe
%ProgramFiles%\cnnic\cdn\cdnup.exe
%ProgramFiles%\cnnic\cdn\cdnuplib.dll
%ProgramFiles%\cnnic\cdn\client.dll
%ProgramFiles%\cnnic\cdn\idnconv.dll
%ProgramFiles%\cnnic\cdn\idnconvs.dll
%ProgramFiles%\cnnic\cdn\iesrch.dll
%ProgramFiles%\cnnic\cdn\imaconv.dll
%ProgramFiles%\cnnic\cdn\imaoe.dll
%ProgramFiles%\cnnic\cdn\imaol.dll
%ProgramFiles%\cnnic\cdn\rbtnhtm.cab
%ProgramFiles%\cnnic\cdn\update\cdndet.dll
%ProgramFiles%\cnnic\cdn\update\cdnforie.dll
%ProgramFiles%\cnnic\cdn\update\cdnglo.dll
%ProgramFiles%\cnnic\cdn\update\cdnprh.dll
%ProgramFiles%\cnnic\cdn\update\cdnprot.sys
%ProgramFiles%\cnnic\cdn\update\cdnrenew.exe
%ProgramFiles%\cnnic\cdn\update\cdnspie.dll
%ProgramFiles%\cnnic\cdn\update\cdntdns.dll
%ProgramFiles%\cnnic\cdn\update\cdntran.sys
%ProgramFiles%\cnnic\cdn\update\cdnup.exe
%ProgramFiles%\cnnic\cdn\update\cdnuplib.dll
%ProgramFiles%\cnnic\cdn\update\imaoe.dll
%ProgramFiles%\cnnic\cdn\update\wmhlpr.dll
%ProgramFiles%\cnnic\cdncdnctr.exe
 
The following files may also be dropped to the Windows system folder:
<system folder>\cdn.dll
<system folder>\cdnns.dll
<system folder>\drivers\cdnprot.sys
<system folder>\drivers\cdntran.sys

BrowserModifier:Win32/CNNIC may create the following registry entries:
 
HKEY_LOCAL_MACHINE\Software\Classes\Cdn.CdnObj      
HKEY_LOCAL_MACHINE\Software\Microsoft\Code Store Database\Distribution Units\{9A578C98-3C2F-4630-890B-FC04196EF420}    
HKEY_LOCAL_MACHINE\Software\Classes\MailParserSvr.MailParser.1      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{461A86F7-A29D-460A-80D5-52979AA6C46D}      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{8CDCBBA0-4BE1-4199-8389-1B19ED41D3E8}      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{F5824EFB-728A-4726-A5A5-85A68B20EDC3}      
HKEY_CURRENT_USER\Software\CNNIC      
HKEY_LOCAL_MACHINE\Software\Classes\WMHlpr.WMEvtSink.1      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{35980F6E-A137-4E50-953D-813BB8556899}      
HKEY_LOCAL_MACHINE\Software\Classes\CndnIEHelper.Alive      
HKEY_LOCAL_MACHINE\Software\Classes\CndnIEHelper.CndnIEHlprObj.1      
HKEY_LOCAL_MACHINE\Classes\clsid\{F411F2F2-8D8F-41B1-B9D3-4D849ADFE38A}      
HKEY_LOCAL_MACHINE\Software\microsoft\windows\currentversion\uninstall\CdnClient      
HKEY_LOCAL_MACHINE\Software\Classes\WMHlpr.WMHlprObj      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{9A578C98-3C2F-4630-890B-FC04196EF420}      
HKEY_LOCAL_MACHINE\Software\Classes\MailParserSvr.InspectorHandler.1      
HKEY_LOCAL_MACHINE\Software\Classes\CndnIEHelper.CndnIEHlprObj      
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Extensions\CmdMapping   {35980F6E-A137-4E50-953D-813BB8556899}   
HKEY_LOCAL_MACHINE\Software\Classes\WMHlpr.WMHlprObj.1      
HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Extensions\{35980F6E-A137-4E50-953D-813BB8556899}      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run   CdnCtr   
HKEY_LOCAL_MACHINE\Software\Classes\WMHlpr.WMEvtSink      
HKEY_LOCAL_MACHINE\Software\Classes\CdnForIE.IEHlprObj.1      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{5C3853CF-C7E0-4946-B3FA-1ABDB6F48108}      
HKEY_LOCAL_MACHINE\Software\Classes\ieupbho.bho      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run   SearchNet_Up   
HKEY_LOCAL_MACHINE\Software\Classes\CndnIEHelper.Alive.1      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{35980F6E-A137-4E50-953D-813BB8556899}    
HKEY_LOCAL_MACHINE\Software\Classes\MailParserSvr.MailParser      
HKEY_LOCAL_MACHINE\Software\Classes\MailParserSvr.InspectorHandler      
HKEY_LOCAL_MACHINE\Software\Classes\Cdn.CdnObj.1      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run   renewup   
HKEY_LOCAL_MACHINE\Software\CNNIC      
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\cdnprot      
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\cdntran      
HKEY_LOCAL_MACHINE\System\controlset001\services\cdnprot      
HKEY_LOCAL_MACHINE\Software\Classes\clsid\{352E3B3A-CAB5-4DBC-B940-C7F84D0447D8}      
HKEY_LOCAL_MACHINE\Software\Classes\ieupbho.bho.1      
HKEY_CURRENT_USER    SOFTWARE\Microsoft\Internet Explorer\Extensions\CmdMapping   {5C3853CF-C7E0-4946-B3FA-1ABDB6F48108}   
HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Extensions\{5C3853CF-C7E0-4946-B3FA-1ABDB6F48108}      
HKEY_LOCAL_MACHINE\Software\Classes\CdnForIE.IEHlprObj      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5C3853CF-C7E0-4946-B3FA-1ABDB6F48108}      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{35980F6E-A137-4E50-953D-813BB8556899}      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{352E3B3A-CAB5-4DBC-B940-C7F84D0447D8}      
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{F5824EFB-728A-4726-A5A5-85A68B20EDC3}

Symptoms

System Changes
The following system changes may indicate the presence of BrowserModifier:Win32/CNNIC:
  • The addition of a menu item to the Internet Explorer Tools menu and a notice in the address bar:
 
 

Prevention


Alert level: High
First detected by definition: 1.45.287.0
Latest detected by definition: 1.173.2181.0 and higher
First detected on: Oct 07, 2008
This entry was first published on: Dec 08, 2006
This entry was updated on: Apr 17, 2011

This threat is also detected as:
  • Adware.CDN-8 (Clam AV)
  • Win32/Adware.CDN (ESET)
  • Adware-CDNHelper (McAfee)
  • W32/CNNIC.A (Norman)
  • ADW_BDSEARCH.OV (Trend Micro)
  • Adware.CDNHelper.B (VirusBuster)