Threat Explorer

The Threat Explorer is a comprehensive resource consumers can turn to for daily, accurate, up-to-date information on the latest threats, risks and vulnerabilities.



13 February 2007
Risk Impact:
File Names:
C:\runit.exe %Windir%\mile.scr %System%\runit.exe %Windir%\start menu\programs\startup\startit.ex
Systems Affected:


Dialer.Heysan connects to pornographic Web sites without your approval. Often these sites are in other countries, and accessing them can result in expensive phone charges.


Unauthorized access to pornographic sites.


Must be downloaded or transmitted using a download utility from other adult sites.

Antivirus Protection Dates

  • Initial Rapid Release version 02 October 2014 revision 022
  • Latest Rapid Release version 01 February 2015 revision 020
  • Initial Daily Certified version 27 October 2003
  • Latest Daily Certified version 28 September 2010 revision 036
  • Initial Weekly Certified release date 29 October 2003
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

When Dialer.Heysan runs, it performs the following actions:
  1. Copies itself to:
    • C:\Runit.exe
    • %Windir%\Mile.scr
    • %System%\Runit.exe
    • %Windir%\Start menu\Programs\Startup\Startit.exe (This will cause the Dialer to run when Windows is started)

  2. Creates and runs the file, %System%\Dlloc.exe.

  3. Attempts to open a RAS (dial-up) connection to "adult oriented" sites on a pay-per-access basis. Often the numbers are in other countries and charge high rates per minute. There is no verification before accessing these numbers.

  4. This dialer does not install itself and it does not create any registry keys.

The following instructions pertain to all Symantec antivirus products that support security risk detection.
  1. Update the definitions.
  2. Close modem connections.
  3. Run a full system scan.
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 close modem connections
This risk uses available modems to create an Internet connection, sometimes without any visible signs. In order to successfully remove this threat, ensure that all modem-based Internet connections are disconnected before proceeding. For instructions on how to do this, consult the appropriate Internet service provider, computer manufacturer, or operating system documentation.

3. To run the scan
    Start your Symantec antivirus program, and then run a full system scan.

    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 500 Error reading 'url' on type$Link

      Error reading 'url' on type$Link

      Cannot serve request to /content/norton-msm/il/en-il/home/internetsecurity/online-threats/dialer.heysan-2003-102613-3341-99-writeup.html on this server

      ApacheSling/2.4 (jetty/9.2.9.v20150224, Java HotSpot(TM) 64-Bit Server VM 1.8.0_72, Linux 3.10.0-957.27.2.el7.x86_64 amd64)