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Added to the Dr.Web virus database: 2012-11-04

Virus description added:

Technical Information

Malicious functions:
Creates and executes the following:
  • %TEMP%\At.exe
  • %PROGRAM_FILES%\Baidu\Toolbar\BarBroker.exe -RegServer
  • %TEMP%\Setupnn.exe
  • %TEMP%\cqaotu.exe
  • %TEMP%\TheWorld_OEM_4.exe
Executes the following:
  • <SYSTEM32>\cmd.exe /c %TEMP%\$$30689.bat
  • <SYSTEM32>\cmd.exe /c ""%TEMP%\DelTemp.bat" "
  • <SYSTEM32>\regsvr32.exe /s %PROGRAM_FILES%\Youdao\Toolbar\ydtbv2.23\YodaoToolbar.dll
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system :
Creates the following files:
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\帮助指南.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\伴侣导航.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\垃圾清理.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\广告拦截.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\屏蔽列表.url
  • %PROGRAM_FILES%\Baidu\Toolbar\rc.dll
  • %PROGRAM_FILES%\Youdao\Toolbar\ydtbv2.23\YodaoToolbar.dll
  • %APPDATA%\Baidu\Toolbar\rc.dat
  • %PROGRAM_FILES%\Baidu\Toolbar\BarBroker.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\lcun709[1].txt
  • %TEMP%\$$30689.bat
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\卸载百度工具栏.lnk
  • %TEMP%\DelTemp.bat
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\隐私保护.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\修复功能.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\自定义按钮.url
  • %ALLUSERSPROFILE%\Start Menu\Programs\百度工具栏\个性化首页.url
  • %PROGRAM_FILES%\Baidu\Toolbar\BaiduBarX_Tmp\BaiduBarX.dll
  • %TEMP%\At.exe
  • %TEMP%\nss6.tmp\ioSpecial.ini
  • %TEMP%\nsx5.tmp
  • %APPDATA%\Baidu\Toolbar\Custom Buttons\custom.xml
  • %TEMP%\cqaotu.exe
  • %TEMP%\nst2.tmp\System.dll
  • %TEMP%\Setupnn.exe
  • %TEMP%\TheWorld_OEM_4.exe
  • %HOMEPATH%\Start Menu\Жф¶Ї Internet Explorer дЇААЖч.url
  • %APPDATA%\Microsoft\Internet Explorer\Quick Launch\Жф¶Ї Internet Explorer дЇААЖч.url
  • %APPDATA%\Microsoft\Internet Explorer\Quick Launch\№єОпЙМіЗ.url
  • %HOMEPATH%\Desktop\№єОпЙМіЗ.url
  • %PROGRAM_FILES%\Baidu\Toolbar\BaiduBarX.dll
  • %TEMP%\nss6.tmp\modern-wizard.bmp
  • %HOMEPATH%\Desktop\Internet Explorer.url
  • %HOMEPATH%\Favorites\ѕ«Ж·НшЦ·µјєЅ.url
Deletes the following files:
  • %TEMP%\At.exe
  • %TEMP%\Setupnn.exe
  • %TEMP%\nst2.tmp\System.dll
Network activity:
Connects to:
  • '':80
  • 'localhost':1037
HTTP GET requests:
  • '':31803
Searches for the following windows:
  • ClassName: 'MS_WINHELP' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '#32770' 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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Download by serial number

Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

Download Dr.Web

Download by serial number

  1. 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.
  2. 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