
JS/FORTNIGHT
VARIANT REPORTED IN THE WILD
Virus Name : JS/Fortnight.B
Alias : JS.Fortnight.M, JS/Fortnight.D ,
EML.Fortnight, Fortnight.C
Virus type : Java
Script
worm
Threat
level : Medium
Virus
details :
JS/Fortnight.B
is an encrypted Java script worm, uses Microsoft
outlook Express signature facility to spread. It also makes changes
in the Windows HOSTS file to force the infected user to visit virus
author site.
When
viewing the infected mail with a HTML aware e-mail client like
outlook express, the malicious script will be executed
automatically. It connects to virus author site and runs a
java applet. It drops the file S.HTM and sets it to outlook
express signature.
Fortnight
also modifies Internet explorer settings in the registry. It
modifies the security settings to low and changes the home
page, search
page and search bar settings.
Fortnight
uses Microsoft VM ActiveX component to infect the target
systems. This vulnerability allows the worm to drop the file
without user's knowledge.
Manual removal instructions:
1. Install VM ActiveX
component security patch or install latest version of Internet
explorer 6.0
2. Delete the file
C:\%WINDOWS%\S.HTM and C:\%WINDOWS%\HOSTS in Windows folder.
[example: C:\WINDOWS\S.HTM]
3. Open the Outlook
express->Tools->Options->Signatures tab. Remove S.HTM
and uncheck the Add signature option.
4. You have to set the
Internet security settings to Medium. You can do this by
following Start->Settings->Control Panel->Internet
Options->Security->Medium.
5. You need to open the file Fnfix.reg
to reset the Internet explorer home page and search page in
the registry.
How can I protect my
system?
Solo has incorporated Fortnight worm and
variants in its signature file to protect
users from this worm attack. Make sure that you have installed
registered version of Solo Antivirus to protect
your system from all virus threats.
To protect your system
against infection, install the security patches from the
link http://www.microsoft.com/technet/security/bulletin/ms00-075.asp
Otherwise you can install the
latest version of Internet Explorer 6.0.
How
to remove this worm?
If
you found this worm, Run Solo Antivirus and choose delete
option on the worm components. Solo antivirus can detect and
remove JS/Fortnight.B worm safely.
Use the following link to Download 30 day
trial version of Solo antivirus
to
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File viruses, malicious VBS, Java scripts,
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and macro viruses.
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