VBS/FreeLinks.A




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  • Name: VBS/FreeLinks.A
    Aliases:Freelinks, VBS.Freelink
    Type: Encrypted Worm


    Description:

    VBS/FreeLinks.A is an encrypted worm that is written in VBScript and is now in-the-wild. It infects Windows 98 Windows 2000 and other Windows systems that support VB Scripting language. When it is executed, the worm sends a copy of itself through Outlook, IRC chat client scripting and shared network drives. There is no known destructive payload.

    When executed, the worm creates a file [RUNDLL.VBS] in the Windows System directory and modifies the registry so that RUNDLL.VBS is executed when the system is booted up:

      HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Current Version\Run\Rundll=Rundll.vbs
    If mIRC or PIRCH IRC clients are found, RUNDLL.VBS spreads by sending itself to users on the same chat channel. The worm also creates a file [LINKS.VBS] in the root of mapped network drives, allowing it to spread through the network .

    The worm displays a dialog box containing the following text:

      "This will add a shortcut to free XXX links on your desktop. Do you want to continue?"
    If the "Yes" button is selected, a shortcut is created on the desktop titled "Free XXX Links" linking to http://www.sublimedirectory.com.

    The worm will also spread itself using Outlook by mailing itself out as an attachment named LINKS.VBS to all address book entries.


      Subject: "Check This"

      To: [no entry in this field]

      Message Body:


        "Have fun with these links.

        Bye."

    When the attachment is executed, the worm mails itself to all address book entries and empties the sent mail folder to remove traces of the mailing. VBS/FreeLinks.A is detected by Command AntiVirus 4.57.1. Version 4.57 will also detect the worm when the scan engine update dated 8/12/99 is installed.





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