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Adware.WinLog

Adware.WinLog

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

Behavior


Adware.WinLog is an adware program that attempts to connect to pornographic Web sites without the user's permission. It may also target advertisements based on information obtained from the user's browsing habits.

Note: Virus definitions before November 26, 2004 may detect this adware as Trojan.Hazzer.

Symptoms


Your Symantec product detects this threat as Adware.WinLog.

Behavior


The file must be manually executed to install this program.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version March 23, 2017 revision 037
  • Initial Daily Certified version December 03, 2004
  • Latest Daily Certified version March 23, 2017 revision 041
  • Initial Weekly Certified release date December 08, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Adware.WinLog is executed, it performs the following actions:
  1. Adds the value:

    "winlogon"="<path to executable>"

    to the registry key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    so that the Adware runs every time Windows starts.

  2. Adds the values:

    "iLastView"="156"
    "iLastCount"="0x00000000"

    to the registry key:

    HKEY_CURRENT_USER\SOFTWARE\Microsoft\Active Setup\

  3. Creates the following files:
    • %Windir%help_dcc.dll
    • %Windir%help_ecc.dll

      Note: %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 current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.
    1. Disable System Restore (Windows Me/XP).
    2. Update the virus definitions.
    3. Run a full system scan and delete all the files detected as Adware.WinLog.
    4. Delete the value that was added to the registry.
    For specific details on each of these steps, read the following instructions.

    1. To disable System Restore (Windows Me/XP)
    If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

    Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

    Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

    For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
    Note:
    When you are completely finished with the removal procedure and are satisfied that the threat has been removed, re-enable System Restore by following the instructions in the aforementioned documents.


    For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article, "Antivirus Tools Cannot Clean Infected Files in the _Restore Folder ," Article ID: Q263455.

    2. To update the virus definitions
    Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
    • Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to the Virus Definitions (LiveUpdate).
    • Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to the Virus Definitions (Intelligent Updater).

      The Intelligent Updater virus definitions are available: Read "How to update virus definition files using the Intelligent Updater" for detailed instructions.

    3. To scan for and delete the infected files
    1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
    2. Run a full system scan.
    3. If any files are detected as infected with Adware.WinLog, click Delete.


      Note:
      If your Symantec antivirus product reports that it cannot delete an infected file, Windows may be using the file. To fix 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, you can leave the computer in Safe mode and proceed with section 4. When that is done, restart the computer in Normal mode.)
    4. To delete 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 keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
    1. Click Start > Run.
    2. Type regedit

      Then click OK.

    3. Navigate to the key:

      HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    4. In the right pane, delete the value:

      "winlogon"="<path to executable>"

    5. Navigate to the key:

      HKEY_CURRENT_USER\SOFTWARE\Microsoft\Active Setup

    6. In the right pane, delete the values:

      "iLastView"
      "iLastCount"

    7. Exit the Registry Editor.