W32.Ixas@mm

Risk Level 2: Low

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Discovered:: February 17, 2003
Updated:: February 13, 2007 11:43:12 AM
Also Known As:: WORM_IXAS.A [Trend], W32/Ixas@MM [McAfee], W32/GvoWFI.A@mm [F-Prot]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows XP

W32.Ixas@mm is a mass-mailing worm that uses its own SMTP engine to send itself to all the contacts in Windows Address Book.

The email has the following characteristics:

From: <random letters>@delfi.lt
Subject: The subject can be one of the following,

Gift for you
Urgent NEWs
EBAY Update
Antivirus Update
Urgent Windows UPDATE
Hi, look this attcahment
Hello, please wisit this nice site

Attachment: Attachment has a random file name with a .exe file extension.

The worm also sends itself to the email addresses it finds from the incoming emails. The email it creates for this set of email addresses has the following characteristics:

Subject: Re:
Attachment: Attachment has a random file name.
Message:
I reply as soon as possible to your email
You wrote:----------

Several variants of this threat have been found. All the variants are written in the Microsoft C++ programming language. ASPack packs some of the variants.

Antivirus Protection Dates

Initial Rapid Release version February 18, 2003
Latest Rapid Release version August 20, 2008 revision 017
Initial Daily Certified version February 18, 2003
Latest Daily Certified version August 20, 2008 revision 016
Initial Weekly Certified release date February 19, 2003

Click for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment

Wild

Wild Level: Low
Number of Infections: 0 - 49
Number of Sites: 0 - 2
Geographical Distribution: Low
Threat Containment: Easy
Removal: Moderate

Damage

Damage Level: Low

Distribution

Distribution Level: High

Writeup By: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16