Dialer.Tronyx

Dialer.Tronyx

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

Behavior


Dialer.Tronyx is a program that makes the compromised computer call high-cost telephone numbers using a modem.

Symptoms


Your Symantec program detects Dialer.Tronyx

Behavior


This security risk must be manually installed

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version October 02, 2014 revision 022
  • Initial Daily Certified version May 24, 2005
  • Latest Daily Certified version September 28, 2010 revision 036
  • Initial Weekly Certified release date May 25, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Dialer.Tronyx is installed, it performs the following actions:
  1. Dials high-cost numbers and then deletes itself. Consequently it does not create or leave any files.

  2. Adds the following lines:

    • nocard400
    • nocard401
    • nocard402
    • nocard403

      to the following file:

      %UserProfile%\Application\Data\Microsoft\Network\Connections\Pbk\rasphone.pbk:

      Note: %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).


The following instructions pertain to all Symantec antivirus products that support security risk detection.
  1. Update the definitions.
  2. Run a full system scan.
  3. To delete the entries added to the RAS phonebook file
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, 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.

3. To delete the entries added to the RAS phonebook file

Note:
The location of the RAS phonebook file, rasphone.pbk, may vary and some computers may not have this file.

For example, if the file exists in Windows XP, it is usually located in the C:\Documents and Settings\All Users\Application Data\Microsoft\Network\Connections\Pbk folder.

Follow the instructions for your operating system:
  • Windows 95/98/Me/NT/2000
    1. Click Start, point to Find or Search, and then click Files or Folders.
    2. Make sure that "Look in" is set to (C:) and that "Include subfolders" is checked.
    3. In the "Named" or "Search for..." box, type:

      rasphone.pbk

    4. Click Find Now or Search Now.
    5. If you find rasphone.pbk, right-click the file, and then click Open With.
    6. Deselect the Always use this program to open this program check box.
    7. Scroll through the list of programs and double-click Notepad.
    8. When the file opens, delete the following lines:

      nocard400
      nocard401
      nocard402
      nocard403
    9. Close Notepad and save your changes when prompted.

  • Windows XP
    1. Click Start, and then click Search.
    2. Click All files and folders.
    3. In the "All or part of the file name" box, type:

      rasphone.pbk

    4. Verify that "Look in" is set to "Local Hard Drives" or to (C:).
    5. Click More advanced options.
    6. Check Search system folders.
    7. Check Search subfolders.
    8. Click Search.
    9. If you find rasphone.pbk file, right-click the file, and then click Open With.
    10. Deselect the Always use this program to open this program check box.
    11. Scroll through the list of programs and double-click Notepad.
    12. When the file opens, delete the following lines:

      nocard400
      nocard401
      nocard402
      nocard403
    13. Close Notepad and save your changes when prompted.