Discussion in 'malware problems & news' started by Randy_Bell, Nov 30, 2002.

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  1. Randy_Bell

    Randy_Bell Registered Member

    May 24, 2002
    Santa Clara, CA
    Symantec Security Response - W32.Balick.Trojan

    W32.Balick.Trojan is a Trojan horse that attempts to obtain an ad-click credit for the Trojan's author. It will copy itself to the \System folder as Csss.exe.

    Type: Trojan Horse
    Infection Length: 28,672 bytes
    Systems Affected: Windows 95, Windows 98, Windows NT, Windows 2000, Windows XP, Windows Me
    Systems Not Affected: Windows 3.x, Macintosh, OS/2, Unix, Linux

    technical details

    When it is executed, W32.Balick.Trojan displays this message box:


    • If you click "I agree," the Trojan:

      • 1. Copies itself as the file %windir%\System\Csss.exe

        NOTE: %windir% is a variable. The Trojan locates the Windows installation folder (by default this is C:\Windows or C:\Winnt) and copies itself to the \System folder in that location.

        2. It adds the value

        csss %windir%\System\Csss.exe

        to the registry key


        As a result, then next time that you start Windows (and each time after that) the Trojan runs and contacts many Web sites in an attempt to gain ad-clicks for the Trojan's author.
    • If I click "I do not Agree," the Trojan exits.

    removal instructions

    NOTE: These instructions are for all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

    • 1. Update the virus definitions
      2. Run a full system scan.
      3. Delete all files that are detected as W32.Balick.Trojan.
      4. Delete the value

      csss %windir%\System\Csss.exe

      from the registry key


    To delete the value from the registry:

    CAUTION: Symantec strongly recommends that you back up the registry before you make any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify only the keys that are specified. Read the document How to make a backup of the Windows registry for instructions.

    • 1. Click Start, and click Run. The Run dialog box appears.
      2. Type regedit and then click OK. The Registry Editor opens.
      3. Navigate to the key


      4. In the right pane, delete the value

      csss %windir%\System\Csss.exe

      5. Exit the Registry Editor.
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