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W32/Buchon.C - Be careful of non-deliverable email messages

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#1 harrywaldron


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Posted 13 January 2005 - 05:59 AM

This new email worm is socially engineered well to disquise itself as a non-delivery message. It uses several spaces in the name of the attachment and a "com" extension to appear potentially safe at first glance. This one could spread quickly until all AV vendors have protection available, as non-delivery email is something users will usually follow up on.

W32/Buchon.C - Be careful of non-deliverable email messages

This mass-mailing worm bears the following characteristics:

* contains its own SMTP engine to construct outgoing messages
* harvests target email addresses from the victim machine
* spoofs the From: address
* drops a trojan (keylogging and proxy) to the victim machine

Outgoing messages are deceptive and may be constructed as follows:

From: Spoofed

Subject: Mail Delivery failure - (insert target email address)

Message Body:

If the message will not displayed automatically, you can check original in attached message.txt. Failed message also saved at: www.(insert server name)/inbox/security/read.asp? sessionid-(random number) (check attached instructions)

+++ Attachment: No Virus found
+++ MC-Afee AntiVirus - www.mcafee.com

Attachment: Copy of the worm with the following filename:

message txt (many spaces) length (random number) bytes (many spaces) mcafee.com

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