Threat Explorer

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Adware.ClickDLoader.B

Adware.ClickDLoader.B

Updated:
February 13, 2007
Risk Impact:
High
Systems Affected:
Windows

Behavior


Adware.ClickDLoader.B downloads and creates several adware files.

Symptoms


Your Symantec product detects this threat as Adware.ClickDLoader.B.

Behavior


This adware must be manually installed.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version February 01, 2015 revision 020
  • Initial Daily Certified version December 12, 2004
  • Latest Daily Certified version January 26, 2015 revision 023
  • Initial Weekly Certified release date December 15, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Adware.ClickDLoader is run, it does the following:
  1. Creates some of the following files:
    • %ProgramFiles%\cf.html
    • %ProgramFiles%\ct.html
    • %ProgramFiles%\mt.html
    • %ProgramFiles%\tc.html


      Containing links to scripts on the following domains:
    • install.xxxtoolbar.com
    • c4tdownload.com
    • frame.crazywinnings.com
    • www.mt-download.com

      Note: %ProgramFiles% is a variable that refers to the program files folder. By default, this is C:\Program Files.

  2. Opens a created .html file with a hidden instance of Microsoft Internet Explorer. This may download and install other applications.

  3. Deletes the following files:
    • %System%\exdl1.exe
    • %System%\kalvcar32.exe
    • %System%\khooker.exe
    • %System%\trkgif.exe
    • %Windir%\bargains.exe
    • %Windir%\cashback.exe
    • %Windir%\pconugl.exe
    • %Windir%\zeta.exe
    • C:\DOCUME~1\PRODUC~1\LOCALS~1\Temp\iinstall.exe
    • C:\Documents and Settings\<user>\Application Data\180ax.exe
    • C:\Documents and Settings\<user>\Application Data\actalert.exe
    • C:\Documents and Settings\<user>\Application Data\bargains.exe
    • C:\Documents and Settings\<user>\Application Data\cashback.exe
    • C:\Documents and Settings\<user>\Application Data\CMESys.exe
    • C:\Documents and Settings\<user>\Application Data\exdl1.exe
    • C:\Documents and Settings\<user>\Application Data\iinstall.exe
    • C:\Documents and Settings\<user>\Application Data\kalvcar32.exe
    • C:\Documents and Settings\<user>\Application Data\khooker.exe
    • C:\Documents and Settings\<user>\Application Data\Netscp.exe
    • C:\Documents and Settings\<user>\Application Data\optimize.exe
    • C:\Documents and Settings\<user>\Application Data\pconugl.exe
    • C:\Documents and Settings\<user>\Application Data\PIB.exe
    • C:\Documents and Settings\<user>\Application Data\sais.exe
    • C:\Documents and Settings\<user>\Application Data\TBPS.exe
    • C:\Documents and Settings\<user>\Application Data\trkgif.exe
    • C:\Documents and Settings\<user>\Application Data\WebRebates1.exe
    • C:\Documents and Settings\<user>\Application Data\WSup.exe
    • C:\Documents and Settings\<user>\Application Data\WToolsA.exe
    • C:\Documents and Settings\<user>\Application Data\WToolsS.exe
    • C:\Documents and Settings\<user>\Application Data\zeta.exe
    • C:\PROGRA~1\Toolbar\PIB.exe
    • C:\Program Files\180Solutions\sais.exe
    • C:\Program Files\BullsEye Network
    • C:\Program Files\BullsEye Network\bin\bargains.exe
    • C:\Program Files\CashBack
    • C:\Program Files\Common Files\CMEII\CMESys.exe
    • C:\Program Files\Common Files\WinTools\WSup.exe
    • C:\Program Files\Common Files\WinTools\WToolsA.exe
    • C:\Program Files\Common Files\WinTools\WToolsS.exe
    • C:\Program Files\Internet Optimizer\actalert.exe
    • C:\Program Files\Internet Optimizer\optimize.exe
    • C:\Program Files\ISTsvc\istsvc.exe
    • C:\Program Files\Toolbar\TBPS.exe
    • C:\Program Files\Web_Rebates\WebRebates1.exe
    Note:
    • %System% is a variable that refers to the System folder. By default this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
    • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.



The following instructions pertain to all Symantec antivirus products that support Security Risk detection.
  1. Update the definitions.
  2. Run a full system scan.
For specific details on each of these steps, read the following instructions.

1. To update the definitions
To obtain the most recent definitions, start your Symantec program and run LiveUpdate.

2. To run the scan
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected as Adware.ClickDownloader.B and depending on which software version you are using, you may see one or more of the following options:

    Note: This applies only to versions of Norton AntiVirus that support Security Risk detection. If you are running a version of Symantec AntiVirus Corporate Edition that supports Security Risk detection, and Security Risk detection has been enabled, you will only see a message box that gives the results of the scan. If you have questions in this situation, contact your network administrator.
    • Exclude (Not recommended): If you click this button, it will set the threat so that it is no longer detectable. That is, the antivirus program will keep the security risk on your computer and will no longer detect it to remove from your computer.

    • Ignore or Skip: This option tells the scanner to ignore the threat for this scan only. It will be detected again the next time that you run a scan.

    • Cancel: This option is new to Norton Antivirus 2005. It is used when Norton Antivirus 2005 has determined that it cannot delete a security risk. This Cancel option tells the scanner to ignore the threat for this scan only, and thus, the threat will be detected again the next time that you run a scan.

      To actually delete the security risk:
      • Click its file name (under the Filename column).
      • In the Item Information box that displays, write down the full path and file name.
      • Then use Windows Explorer to locate and delete the file.

        If Windows reports that it cannot delete the file, this indicates that the file is in use. In this situation, complete the rest of the instructions on this page, restart the computer in Safe mode, and then delete the file using Windows Explorer.

    • Delete: This option will attempt to delete the detected files. In some cases, the scanner will not be able to do this.
      • If you see a message, "Delete Failed" (or similar message), manually delete the file.
      • Click the file name of the threat that is under the Filename column.
      • In the Item Information box that displays, write down the full path and file name.
      • Then use Windows Explorer to locate and delete the file.

        If Windows reports that it cannot delete the file, this indicates that the file is in use. In this situation, complete the rest of the instructions on this page, restart the computer in Safe mode, and then delete the file using Windows Explorer.