W32.Explet.A@mm

Risk Level 2: Low

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Discovered:: June 2, 2004
Updated:: February 13, 2007 12:23:57 PM
Also Known As:: I-Worm.Plexus.a [Kaspersky], WORM_PLEXUS.A [Trend], Win32.Mimail.W [Computer Assoc, W32/Plexus@MM [McAfee]
Type:: Worm
Systems Affected:: Windows 2000, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
CVE References:: CAN-2003-0533 CAN-2003-0352

W32.Explet.A@mm is a mass-mailing worm that also spreads through network shares and the Kazaa file-sharing network. The worm exploits the Microsoft Windows LSASS Buffer Overrun Vulnerability (described in Microsoft Security Bulletin MS04-011) and the DCOM RPC vulnerability (described in Microsoft Security Bulletin MS03-026) through TCP ports 135 and 445. It may also lower security settings and download remote files.

Antivirus Protection Dates

Initial Rapid Release version June 3, 2004
Latest Rapid Release version March 23, 2012 revision 024
Initial Daily Certified version June 3, 2004
Latest Daily Certified version March 24, 2012 revision 019
Initial Weekly Certified release date June 7, 2004

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: 3 - 9
Geographical Distribution: Low
Threat Containment: Easy
Removal: Moderate

Damage

Damage Level: Medium

Distribution

Distribution Level: High

Writeup By: Yana Liu

Technical Details

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Internet Security Threat Report, Volume 16