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Adware.Istbar

Adware.Istbar

Updated:
February 13, 2007
Publisher:
Integrated Search Technologies
Risk Impact:
Medium
File Names:
IstBar_DH.dll istbar.dll istbarcm.dll istdownload.exe cmctl.dll istbarcm.dll ysbactivex.dll
Systems Affected:
Windows

Behavior


Note: Virus definitions dated October 15th, 2005 or earlier may detect this threat asTrojan.ISTsvc

Adware.Istbar is an adware component, which does one or more of the following:
  • Installs an Internet Explorer toolbar
  • Acts as a Home page and search hijacker

Symptoms


Your Symantec program detects Adware.Istbar

Behavior


This security risk can be downloaded from a Web page using an ActiveX installer.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version July 20, 2017 revision 023
  • Initial Daily Certified version September 22, 2003 revision 003
  • Latest Daily Certified version July 21, 2017 revision 001
  • Initial Weekly Certified release date September 24, 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Note: Detections dated March 3rd, 2005 or earlier may detect this adware as Adware.Istbar!Dl.

When Adware.Istbar is installed, it does the following:
  1. May create some of the following folders and files :

    • %ProgramFiles%\ISTbar\cmctl.dll
    • %ProgramFiles%\ISTbar\istbarcm.dll
    • %ProgramFiles%\ISTbar\imagemap_normal.bmp
    • %ProgramFiles%\ISTbar\imagemap_over.bmp
    • %ProgramFiles%\ISTbar\version.txt
    • %ProgramFiles%\ISTbar\xml_istbar.xml
    • %ProgramFiles%\IstSvc\istsvc.exe
    • %Windir%\[RANDOM FILE NAME].exe
    • %Windir%\Downloaded Program Files\ysbactivex.dll
    • %Windir%\Downloaded Program Files\istactivex.dll
    • %UserProfile%\Favorites\Fun & Games, drops numerous link files in this folder
    • %UserProfile%\Favorites\Going Places, drops numerous link files in this folder
    • %UserProfile%\Favorites\Living, drops numerous link files in this folder
    • %UserProfile%\Favorites\Shop, drops numerous link files in this folder
    • %UserProfile%\Favorites\Technology, drops numerous link files in this folder

      Notes:
    • %ProgramFiles% is a variable that refers to the program files folder. By default, this is C:\Program Files.
    • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows (Windows 95/98/Me/XP)or C:\Winnt (Windows NT/2000).
    • %UserProfile% is a variable that refers to the current user's profile folder. By default, this is C:\Documents and Settings\[Current User] (Windows NT/2000/XP).

  2. Adds the values:

    "IST Service" = "%ProgramFiles%\IstSvc\istsvc.exe"
    "[RANDOM NAME]" = "%Windir%\[RANDOM FILE NAME].exe"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that the risk runs when Windows starts.

  3. Creates some of the following registry keys:

    HKEY_LOCAL_MACHINE\SOFTWARE\ISTbar
    HKEY_CURRENT_USER\Software\ISTbar
    HKEY_CURRENT_USER\Software\IST
    HKEY_LOCAL_MACHINE\SOFTWARE\ISTsvc
    HKEY_CLASSES_ROOT\ISTbar.BarObj
    HKEY_CLASSES_ROOT\Pugi.PugiObj.1
    HKEY_CLASSES_ROOT\Pugi.PugiObj
    HKEY_CLASSES_ROOT\TestContentMatchControl1.ContentMatchTag
    HKEY_CLASSES_ROOT\TestContentMatchControl1.ContentMatchTag.1
    HKEY_CLASSES_ROOT\CLSID\{018B7EC3-EECA-11D3-8E71-0000E82C6C0D}
    HKEY_CLASSES_ROOT\CLSID\{386A771C-E96A-421f-8BA7-32F1B706892F}
    HKEY_CLASSES_ROOT\CLSID\{42F2C9BA-614F-47c0-B3E3-ECFD34EED658}
    HKEY_CLASSES_ROOT\CLSID\{5F1ABCDB-A875-46c1-8345-B72A4567E486}
    HKEY_CLASSES_ROOT\CLSID\{771A1334-6B08-4a6b-AEDC-CF994BA2CEBE}
    HKEY_CLASSES_ROOT\CLSID\{7C559105-9ECF-42b8-B3F7-832E75EDD959}
    HKEY_CLASSES_ROOT\CLSID\{DC341F1B-EC77-47BE-8F58-96E83861CC5A}
    HKEY_CLASSES_ROOT\CLSID\{FAA356E4-D317-42A6-AB41-A3021C6E7D52}
    HKEY_CLASSES_ROOT\Interface\{0985C112-2562-46F2-8DA6-92648BA4630F}
    HKEY_CLASSES_ROOT\Interface\{0E704BA4-C517-4BE7-A1CD-C3FFDA1E1FFE}
    HKEY_CLASSES_ROOT\Interface\{7B178417-3CDA-444F-94FF-312C0A3A78A8}
    HKEY_CLASSES_ROOT\Interface\{7B9A715E-9D87-4C21-BF9E-F914F2FA953F}
    HKEY_CLASSES_ROOT\Interface\{90CE74CC-788A-4A00-B38D-CBCA08CC9E8F}
    HKEY_CLASSES_ROOT\Interface\{9388907F-82F5-434D-A941-BB802C6DD7C1}
    HKEY_CLASSES_ROOT\Interface\{A36A5936-CFD9-4B41-86BD-319A1931887F}
    HKEY_CLASSES_ROOT\Interface\{BF06DA8E-2BEB-4816-9BBD-F7625246E245}
    HKEY_CLASSES_ROOT\Interface\{DC065FA6-08F9-4C50-99DC-275D16CFC5BD}
    HKEY_CLASSES_ROOT\Interface\{EAF2CCEE-21A1-4203-9F36-4929FD104D43}
    HKEY_CLASSES_ROOT\TypeLib\{67907B3C-A6EF-4A01-99AD-3FCD5F526429}
    HKEY_CLASSES_ROOT\Typelib\{68BF4626-D66B-4383-A6AF-62E57E9B6CD4}
    HKEY_CLASSES_ROOT\Typelib\{6D3F5DE4-E980-4407-A10F-9AC771ABAAE6}
    HKEY_CLASSES_ROOT\TypeLib\{89A10D64-83BF-41A4-86A3-7AAF1F8F3D1B}
    HKEY_CLASSES_ROOT\TypeLib\{8C752C5E-3C10-4076-AF0A-FFC69FA20D1B}
    HKEY_CLASSES_ROOT\TypeLib\{CC257918-F435-4A33-8231-2B8195990CCA}
    HKEY_CLASSES_ROOT\TypeLib\{DB447818-96B4-40DF-8A55-720DA496F514}
    HKEY_CLASSES_ROOT\TypeLib\{E9A5B71C-093B-4F34-AF07-34FCA89BA0DF}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database
    \Distribution Units\{42F2C9BA-614F-47C0-B3E3-ECFD34EED658}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database
    \Distribution Units\{7C559105-9ECF-42B8-B3F7-832E75EDD959}
    HKEY_CLASSES_ROOT\Component Categories
    \{00021494-0000-0000-C000-000000000046}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Uninstall\ISTbar
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Uninstall\ISTbarISTbar
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Uninstall\ISTsvc
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\CurrentVersion\Explorer
    \Browser Helper Objects\{A3FDD654-A057-4971-9844-4ED8E67DBBB8}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Internet Settings\ZoneMap\Domains\contentmatch.net
    HKEY_CLASSES_ROOT\ISTx.Installer
    HKEY_CLASSES_ROOT\ISTx.Installer.2
    HKEY_CLASSES_ROOT\ISTactivex.Installer
    HKEY_CLASSES_ROOT\ISTactivex.Installer.1
    HKEY_CLASSES_ROOT\ISTactivex.Installer.2
    HKEY_CLASSES_ROOT\YSBactivex.Installer.1
    HKEY_CLASSES_ROOT\YSBactivex.Installer

  4. Adds the values:

    "Bandrest" = "Never"
    "Search Bar" = "[WEB SITE ON THE COULDNOTFIND.COM DOMAIN]"
    "Search Page" = [WEB SITE ON THE COULDNOTFIND.COM DOMAIN]"
    "Search Page_bak" = [WEB SITE ON THE COULDNOTFIND.COM DOMAIN]"
    "Start Page" = [WEB SITE ON THE COULDNOTFIND.COM DOMAIN]"
    "Start Page_bak" = "file:/ //C:/WINNT/Web/Start.htm"
    "Use Search Assistant" = "no"

    to the registry subkey:

    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main

    to redirect the start page and search pages.

  5. Adds the value:

    "Bandrest" = "Never"

    to the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main

  6. The file %Windir%\[RANDOM FILE NAME].exe, opens itself for shared access in such a way that it prevents other programs from accessing the file.

  7. Adds the values:

    "{FAA356E4-D317-42A6-AB41-A3021C6E7D52}" = ""
    "{5F1ABCDB-A875-46C1-8345-B72A4567E486}" = ""

    to the registry subkeys:

    HKEY_LOCAL_MACHINE%\SOFTWARE\Microsoft\Internet Explorer\Toolbar
    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser

  8. Adds the following toolbar to all Internet Explorer windows:




  9. Displays links in the toolbar area relating to words typed anywhere in an Internet Explorer window.



Note: Removing this adware component from the system will likely cause the program that installed it to not function as intended. The uninstaller generally identifies the programs that will not work after uninstallation.

Removal using the Adware.Istbar Removal Tool
Symantec Security Response has developed a removal tool for Adware.Istbar. Use this removal tool first, as it is the easiest way to remove this threat.

The tool can be found here:
http://securityresponse.symantec.com/avcenter/FxIstbar.exe

The current version of the tool is version 1.1.0. It will have a digital signature timestamp of 9 September 2005 11:29:30 PM PST

Notes:
  • The date and time displayed will be adjusted to your time zone, if your computer is not set to the Pacific time zone.
  • The removal tool may terminate Internet Explorer and Windows Explorer. It is recommended that users save their work and log out of these programs before running the removal tool.
  • The removal tool will not delete some harmless Temporary Internet files, which Adware.Istbar created, in C:\Documents and Setings\Administrator\Local Settings\Temporary Internet Files. These can be manually deleted using the following steps:
    1. Start Internet Explorer.
    2. Click Tools > Internet Options.
    3. In the Temporary Internet Files section, then click the Delete Files button.
    4. Check Delete all offline content, and then click OK.
  • The Removal tool will not reset any changes made to settings in Internet Explorer. To restore default settings in Internet Explorer it is necessary to perform the following actions:
    a. Click Start > Settings > Control Panel
    b. Select Internet Options
    c. Select the Programs tab
    d. Click Reset Web Settings
    e. Click OK
    f. Exit Control Panel

Manual Removal Instructions

The following instructions pertain to all Symantec antivirus products that support security risk detection.
  1. Update the virus definitions.
  2. Restart in Safe mode.
  3. Run a full system scan and delete all the files detected as Adware.Istbar.
  4. Delete the value that was added to the registry.
  5. Restore default settings in Internet Explorer
  6. Delete other files that this Adware uses
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. Restarting the computer in Safe mode
Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode or VGA mode. For instructions, read the document, "How to start the computer in Safe Mode ."


3. To run the scan
  1. Start your Symantec antivirus program, and then run a full system scan.
  2. If any files are detected, 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 risk 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 risk 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 risk for this scan only, and thus, the risk 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.

    • 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 risk 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.

Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode . Once you have restarted in Safe mode, run the scan again.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the risk may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.


4. Deleting the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. Read the document: How to make a backup of the Windows registry .
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

    Note: If the registry editor fails to open the risk may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.

  3. Click Start > Run.
  4. Type regedit > OK.
  5. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main

  6. In the right pane, delete the value if it exists:

    "Bandrest" = "Never"

  7. Navigate to and delete the values:

    "IST Service" = "%ProgramFiles%\IstSvc\istsvc.exe"
    "[RANDOM NAME]" = "%Windir%\[RANDOM FILE NAME].exe"

    from the registry subkey:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

  8. Navigate to and delete the values:

    "{FAA356E4-D317-42A6-AB41-A3021C6E7D52}"
    "{5F1ABCDB-A875-46C1-8345-B72A4567E486}"

    from the registry subkeys:

    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar
    HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser

  9. Navigate to and delete the following subkeys if they exist:

    HKEY_LOCAL_MACHINE\SOFTWARE\ISTbar
    HKEY_CURRENT_USER\Software\ISTbar
    HKEY_CURRENT_USER\Software\IST
    HKEY_LOCAL_MACHINE\SOFTWARE\ISTsvc
    HKEY_CLASSES_ROOT\ISTbar.BarObj
    HKEY_CLASSES_ROOT\Pugi.PugiObj.1
    HKEY_CLASSES_ROOT\Pugi.PugiObj
    HKEY_CLASSES_ROOT\TestContentMatchControl1.ContentMatchTag
    HKEY_CLASSES_ROOT\TestContentMatchControl1.ContentMatchTag.1
    HKEY_CLASSES_ROOT\CLSID\{018B7EC3-EECA-11D3-8E71-0000E82C6C0D}
    HKEY_CLASSES_ROOT\CLSID\{386A771C-E96A-421f-8BA7-32F1B706892F}
    HKEY_CLASSES_ROOT\CLSID\{42F2C9BA-614F-47c0-B3E3-ECFD34EED658}
    HKEY_CLASSES_ROOT\CLSID\{5F1ABCDB-A875-46c1-8345-B72A4567E486}
    HKEY_CLASSES_ROOT\CLSID\{771A1334-6B08-4a6b-AEDC-CF994BA2CEBE}
    HKEY_CLASSES_ROOT\CLSID\{7C559105-9ECF-42b8-B3F7-832E75EDD959}
    HKEY_CLASSES_ROOT\CLSID\{DC341F1B-EC77-47BE-8F58-96E83861CC5A}
    HKEY_CLASSES_ROOT\CLSID\{FAA356E4-D317-42A6-AB41-A3021C6E7D52}
    HKEY_CLASSES_ROOT\Interface\{0985C112-2562-46F2-8DA6-92648BA4630F}
    HKEY_CLASSES_ROOT\Interface\{0E704BA4-C517-4BE7-A1CD-C3FFDA1E1FFE}
    HKEY_CLASSES_ROOT\Interface\{7B178417-3CDA-444F-94FF-312C0A3A78A8}
    HKEY_CLASSES_ROOT\Interface\{7B9A715E-9D87-4C21-BF9E-F914F2FA953F}
    HKEY_CLASSES_ROOT\Interface\{90CE74CC-788A-4A00-B38D-CBCA08CC9E8F}
    HKEY_CLASSES_ROOT\Interface\{9388907F-82F5-434D-A941-BB802C6DD7C1}
    HKEY_CLASSES_ROOT\Interface\{A36A5936-CFD9-4B41-86BD-319A1931887F}
    HKEY_CLASSES_ROOT\Interface\{BF06DA8E-2BEB-4816-9BBD-F7625246E245}
    HKEY_CLASSES_ROOT\Interface\{DC065FA6-08F9-4C50-99DC-275D16CFC5BD}
    HKEY_CLASSES_ROOT\Interface\{EAF2CCEE-21A1-4203-9F36-4929FD104D43}
    HKEY_CLASSES_ROOT\TypeLib\{67907B3C-A6EF-4A01-99AD-3FCD5F526429}
    HKEY_CLASSES_ROOT\Typelib\{68BF4626-D66B-4383-A6AF-62E57E9B6CD4}
    HKEY_CLASSES_ROOT\Typelib\{6D3F5DE4-E980-4407-A10F-9AC771ABAAE6}
    HKEY_CLASSES_ROOT\TypeLib\{89A10D64-83BF-41A4-86A3-7AAF1F8F3D1B}
    HKEY_CLASSES_ROOT\TypeLib\{8C752C5E-3C10-4076-AF0A-FFC69FA20D1B}
    HKEY_CLASSES_ROOT\TypeLib\{CC257918-F435-4A33-8231-2B8195990CCA}
    HKEY_CLASSES_ROOT\TypeLib\{DB447818-96B4-40DF-8A55-720DA496F514}
    HKEY_CLASSES_ROOT\TypeLib\{E9A5B71C-093B-4F34-AF07-34FCA89BA0DF}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database
    \Distribution Units\{42F2C9BA-614F-47C0-B3E3-ECFD34EED658}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Code Store Database
    \Distribution Units\{7C559105-9ECF-42B8-B3F7-832E75EDD959}
    HKEY_CLASSES_ROOT\Component Categories
    \{00021494-0000-0000-C000-000000000046}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Uninstall\ISTbar
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Uninstall\ISTbarISTbar
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Uninstall\ISTsvc
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\CurrentVersion\Explorer
    \Browser Helper Objects\{A3FDD654-A057-4971-9844-4ED8E67DBBB8}
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
    \Internet Settings\ZoneMap\Domains\contentmatch.net
    HKEY_CLASSES_ROOT\ISTx.Installer
    HKEY_CLASSES_ROOT\ISTx.Installer.2
    HKEY_CLASSES_ROOT\ISTactivex.Installer
    HKEY_CLASSES_ROOT\ISTactivex.Installer.1
    HKEY_CLASSES_ROOT\ISTactivex.Installer.2
    HKEY_CLASSES_ROOT\YSBactivex.Installer.1
    HKEY_CLASSES_ROOT\YSBactivex.Installer
  10. Exit the Registry Editor.

5. To restore default settings in Internet Explorer
    a. Click Start > Settings > Control Panel
    b. Select Internet Options
    c. Select the Programs tab
    d. Click Reset Web Settings
    e. Click OK
    f. Exit Control Panel

6. To delete other files that this Adware uses
    Using Windows Explorer, browse to and delete the following folders if they exist:

    • %ProgramFiles%\ISTbar\cmctl.dll
    • %ProgramFiles%\ISTbar\istbarcm.dll
    • %ProgramFiles%\ISTbar\imagemap_normal.bmp
    • %ProgramFiles%\ISTbar\imagemap_over.bmp
    • %ProgramFiles%\ISTbar\version.txt
    • %ProgramFiles%\ISTbar\xml_istbar.xml
    • %UserProfile%\Favorites\Fun & Games, drops numerous link files in this folder
    • %UserProfile%\Favorites\Going Places, drops numerous link files in this folder
    • %UserProfile%\Favorites\Living, drops numerous link files in this folder
    • %UserProfile%\Favorites\Shop, drops numerous link files in this folder
    • %UserProfile%\Favorites\Technology, drops numerous link files in this folder