Virus dans un courrier de Micro$oft ?

Bonjour,

Vendredi j'ai reçu un courrier (non désiré) de micro$oft et Norton Anti
Virus en a viré le fichier attaché :

Source : Update155.exe
Description : La pièce jointe Update155.exe est infecté(e) par le virus
W32.Gibe.B@mm.
Cliquez ici pour plus d'informations à propos de ce virus : W32.Gibe.B@mm

Est-il arrivé la même chose à quelqu'un d'autre ?
Est-ce bien un message venant de micro$oft ?

Merci d'avance.
Bien amicalement,
Santi MAURO

Voici le reste du message :

--------------------------------------------------------------------------
From - Fri Aug 29 18:19:14 2003
X-UIDL: 1049627307.2362
X-Mozilla-Status: 0001
X-Mozilla-Status2: 10000000
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X-Comment: AT&T Maillennium special handling code - c
From: "Microsoft Internet Security Center" <cslzkhj-806271@BeeiqUko.com>
To: "Microsoft Customer" <>
SUBJECT: Network Security Update
X-Virus-Scanned: NOD32
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="xJAnLGFtawEHpTC"
Message-Id: <20030829131851.8B2821800064@mwinf0402.wanadoo.fr>

--xJAnLGFtawEHpTC
Content-Type: multipart/alternative; boundary="pOjJfnqyC"

--pOjJfnqyC
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

Microsoft Customer

this is the latest version of security update, the
"August 2003, Cumulative Patch" update which eliminates all
known security vulnerabilities affecting Internet Explorer,
Outlook and Outlook Express as well as five newly discovered
vulnerabilities. Install now to protect your computer from these
vulnerabilities, the most serious of which could allow an attacker to
run executable on your system. This update includes the functionality
of all previously released patches.

System requirements:
Win 9x/Me/2000/NT/XP

This update applies to:
Microsoft Internet Explorer, version 4.01 and later
Microsoft Outlook, version 8.00 and later
Microsoft Outlook Express, version 4.01 and later

Recommendation:
Customers should install the patch at the earliest opportunity.

How to install:
Run attached file. Click Yes on displayed dialog box.

How to use:
You don't need to do anything after installing this item.

Microsoft Technical Support is available at
http://support.microsoft.com/

For security-related information about Microsoft products,
please visit the Microsoft Security Advisor web site at
http://www.microsoft.com/security

Contact us at
http://www.microsoft.com/isapi/goregwiz.asp?target=3D/contactus/=
contactus.asp


Please do not reply to this message. It was sent from an unmonitored
e-mail address and we are unable to respond to any replies.

Thank you for using Microsoft products.

With friendly greetings,
Microsoft Internet Security Center
________________________________________
=A92003 Microsoft Corporation. All rights reserved. The names of =
the actual companies
and products mentioned herein =
may be the trademarks of their respective owners.