Type
Trojan
Description
Troj/CBase-A is a HTML-based downloader Trojan which uses the codebase exploit vulnerability associated with Microsoft Internet Explorer to download and run Troj/LdPinch-I.
The vulnerability allows HTML pages in the "Internet Zone" to launch programs in the "My Computer Zone". For further information see Microsoft security bulletin MS02-015.
Troj/CBase-A arrives on the computer via HTML-based email messages, or by browsing websites whose HTML pages contain Troj/CBase-A.
http://www.sophos.com/virusinfo/analyses/trojcbasea.html

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