W32.Zar.A@mm

Risk Level 2: Low

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Discovered:: January 18, 2005
Updated:: February 13, 2007 12:32:03 PM
Also Known As:: Bloodhound.W32.VBWORM, Zar.A [F-Secure], Email-Worm.Win32.Zar.a [Kasper, W32/Zar@MM [McAfee], W32/VBSun-A [Sophos], WORM_ZAR.A [Trend Micro]
Type:: Worm
Systems Affected:: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP

W32.Zar.A@mm is a mass-mailing worm that uses MAPI to send an email to all addresses in the Microsoft Outlook Address Book. This threat is written in Visual Basic.

Note: Virus definitions dated prior to January 18, 2005 detect this threat as Bloodhound.W32.VBWORM.

Antivirus Protection Dates

Initial Rapid Release version January 18, 2005
Latest Rapid Release version September 28, 2010 revision 054
Initial Daily Certified version January 18, 2005
Latest Daily Certified version September 28, 2010 revision 036
Initial Weekly Certified release date January 19, 2005

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: Asuka Yamamoto

Technical Details

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Internet Security Threat Report, Volume 16