Threat Description

Story

Details

Aliases: Story, Jack-in-the-box
Category: Malware
Type: Virus
Platform: W97M

Summary



W97M/Story is a Word 97 class infector.



Removal



Automatic Disinfection

Allow F-Secure Anti-Virus to disinfect the relevant files.

For more general information on disinfection, please see Removal Instructions.



Technical Details




Variant:Story.A (IrcJack, W97M_JACK_BOX)

When an infected document is opened, the virus infects the global template. After that it infects all documents that are closed.The virus code contains the following text that the virus uses to check whenever the global template or active document has been infected or not:

  'Jack-In-The-Box

When the virus has infected the active document, it saves a copy of it as "C:\Windows\Story.doc". It also checks existence of the mIRC application file, "c:\mirc\mirc32.exe". If the file is found, the virus alters the "mirc.ini" file from the same directory disabling the "Fileserver warning" from "mIRC Options/DCC/Fserve" dialog.The virus also overwrites the existing "script.ini" file with its own, which will cause the following: When a connection is made to any IRC server, there is a 1:8 chance that the script will send a mail to a random anti-virus vendor's support email address containing the following body:

  Jack-In-The-Box Has Popped Up Again!

As a sidenote, this virus sent over 21,000 messages to our sample submission address during three days in November 1999.The script also sends the "C:\Windows\Story.doc" during the IRC session. The file is sent with either of the following messages:

  Hey, I can't talk right now but I wanted to send you this file.
    It has a funny story you should read, and also has macros inside
    that protect you from a lot of viruses.  Just open the document,
    enable the macros, and if you are infected it will get rid of the
    virus
    I'm a little busy so I can't talk much now.  I thought you might
    want to look at this file I got. It has a funny story and also has
    macros in it which get rid of any macro viruses.  Just enable the
    macros when the prompt comes up and it will scan for any viruses
    and clean them.

or without the message at all.The macro virus also disables "Tools/Macro", "Tools/Customize", "View/Toolbars" and "View/Status Bar" menus.


Variant:Story.B

W97M/Story.B is a slightly modified variant of W97M/Story.A.





Technical Details: Katrin Tocheva and Sami Rautiainen, F-Secure


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