1. Symantec/
  2. Security Response/
  3. W32.Dedler.Worm

W32.Dedler.Worm

Risk Level 1: Very Low

Discovered:
March 9, 2004
Updated:
February 13, 2007 12:22:46 PM
Also Known As:
Worm.Win32.Dedler [Kaspersky], W32/Dedler.worm.gen [McAfee]
Type:
Worm
Systems Affected:
Windows

W32.Dedler.Worm is a network-aware worm that copies itself to open network shares.



To delete the DNS entries added to the Windows hosts file
Note: The location of the Hosts file may vary and some computers may not have this file. For example, if the file exists in Windows 98, it will usually be in C:\Windows; and it is located in the C:\WINNT\system32\drivers\etc folder in Windows 2000. There may also be multiple copies of this file in different locations.

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:

      hosts

    4. Click Find Now or Search Now.
    5. For each Hosts file that you find, 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 all the entries in the Hosts file, except for the following line:

      127.0.0.1     localhost

    9. Close Notepad and save your changes when prompted.

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

      hosts

    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. Click Find Now or Search Now.
    10. For each Hosts file that you find, right-click the file, and then click Open With.
    11. Deselect the Always use this program to open this program check box.
    12. Scroll through the list of programs and double-click Notepad.
    13. When the file opens, delete all the entries in the Hosts file except for the following line:

      127.0.0.1     localhost

    14. Close Notepad and save your changes when prompted.

Antivirus Protection Dates

  • Initial Rapid Release version March 10, 2004
  • Latest Rapid Release version October 11, 2017 revision 035
  • Initial Daily Certified version March 10, 2004
  • Latest Daily Certified version October 12, 2017 revision 005
  • Initial Weekly Certified release date March 10, 2004
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
Writeup By: Scott Gettis

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2016 Internet Security Threat Report, Volume 21
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