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WORM_KLEXE.A
Overview

Malware type: Worm

Aliases: Email-Worm.Win32.Klexe (Kaspersky), W32/Klexe@MM (McAfee), W32.Klexe.Worm (Symantec), Worm/Klexe (Avira), W32/Klexe-A (Sophos),

In the wild: No

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP

Encrypted: No

Overall risk rating:


Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This mass-mailing worm propagates via email. It uses Microsoft Outlook to send out a link to its file to all recipients found in the Microsoft Outlook address book.

It sends email with the following details:

Subject: Re:

Message body:
You received this email because you where sent a 'pass this on e-messenger card' through one of our valued partners. If you believe you received this message in error or would no longer like to receive e-mail from us click here
http://www.geocities.com/ecard<blocked>senger/us.htm

To download your card click on the link below:

http://www.geocities.com/ecard<blocked>senger/ecmsetup1.zip

P.S. If you received this message but do not know the sender or wish to unsubscribe or if you have any questions, please mail to services@emmsconline.com

The worm email has no attachment. Instead, it contains a link that points to a zipped copy of this worm (ECMSETUP1.EXE).

The zip file contains the main worm and a keylogger component, which logs user keystrokes and sends them to a specific email address.

This worm displays the following message box after sending email:

The specified file refers to a location that is unavailable. It could be on a hard drive on this computer, on a network, or on a different computer on your home network. Check to make sure that the disk is properly inserted, or that you are connected to the Internet or home network, and then try again. If it still cannot be located, the information might have been moved to a different location.

The worm is written in Visual Basic and requires the ActiveX control file MSWINSCK.OCX. It runs on Windows 95, 98, ME, NT 2000, and XP, as long as the control file is present.

For additional information about this threat, see:
Solution
Technical Details

Description created: Jul. 1, 2003 11:45:58 PM GMT -0800
Description updated: Jul. 2, 2003 5:17:56 AM GMT -0800

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