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Adware.Purityscan.D - Removal

Updated:
February 13, 2007 11:51:17 AM
Type:
Adware
Publisher:
purityscan.com
Risk Impact:
Low
File Names:
hoor.exe
Systems Affected:
Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

The following instructions pertain to all Symantec antivirus products that support Expanded Threat detection.
  1. Update the definitions.
  2. Restart the computer in Safe mode or end the malicious process (hoor.exe or rbap.exe).
  3. Run a full system scan.
  4. Delete the folder.
  5. Delete the value that was added to the registry.
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 restart the computer in Safe mode or end the malicious process (hoor.exe or rbap.exe)

    Windows 95/98/Me
    Shut down the computer and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode. For instructions, read the document, "How to start the computer in Safe Mode."

    Windows NT/2000/XP
    To end the malicious process:
    1. Press Ctrl+Alt+Delete once.
    2. Click Task Manager.
    3. Click the Processes tab.
    4. Double-click the Image Name column header to alphabetically sort the processes.
    5. Scroll through the list and look for hoor.exe or rbap.exe.
    6. If you find the file, click it, and then click End Process.
    7. Exit the Task Manager.

3. 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.PurityScan.D 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 Expanded Threat detection. If you are running a version of Symantec AntiVirus Corporate Edition that supports Expanded Threat detection, and Expanded Threat 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 expanded threat 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 an expanded threat. 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 expanded threat:
      • 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.
4. To delete the folder
    Delete the folder named "%SystemDrive%\Documents and Settings\[user name]\Application Data\mbaa" .
    Delete the folder named "%SystemDrive%\Documents and Settings\[user name]\Application Data\isrd" .

    Note: %SystemDrive% is a variable that refers to the drive on which the Windows installation resides. By default, this is drive C.
[user name] refers to the current user name when the threat was installed.


5. 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\Toos

  4. In the right pane, delete the values:

    "Itsh"=D4 11 51 50 57 F5 B4 D1 B4 00 E1 71
    "Ctsu"=24 13 51 50
    "Potd"=24 9E BE 52 85


e. Navigate to the key:
    HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

f. In the right pane, delete the value:
    "Eech"="%SystemDrive%\Documents and Settings\[user name]\Application Data\hoor.exe"

    Note: %SystemDrive% is a variable that refers to the drive on which the Windows installation resides. By default, this is drive C.
[user name] refers to the current user name when the threat was installed.


g. Exit the Registry Editor.


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