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- Discovered:
- November 8, 2001
- Updated:
- February 13, 2007 11:58:42 AM
- Also Known As:
- W32.Klez.B@mm
- Type:
- Worm
W32.Klez.D@mm is a modified variant of W32.Klez.A@mm. Most of the functionality remains the same. The virus that W32.Klez.A@mm carried, W32.Elkern.3326, is also carried and inserted on the system by this variant.
The worm exploits a vulnerability in Microsoft Outlook and Outlook Express in an attempt to execute itself when you open or even preview the message. Further information and a patch for the vulnerability can be found at
http://www.microsoft.com/technet/security/bulletin/MS01-020.asp
NOTES:
- Definitions dated November 8, 2001, detect this worm as W32.Klez.B@mm.
- Definitions dated prior to November 8, 2001, detect the virus that this variant inserts as W32.ElKern.3326.
For information about how Klez affects a Macintosh computer, read the document Are Macintoshes affected by the Klez virus?
Antivirus Protection Dates
- Initial Rapid Release version November 8, 2001
- Latest Rapid Release version November 8, 2001
- Initial Daily Certified version November 8, 2001
- Latest Daily Certified version November 8, 2001
- Initial Weekly Certified release date pending
Click here 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: Easy
Damage
- Damage Level: High
Distribution
- Distribution Level: Medium
Writeup By: Neal Hindocha
