Many viruses have been spread by users who opened unsafe e-mail attachments, admins have set up filters on mail servers. But now, a quirk in Outlook Express can allow attachments to bypass filters and look harmless to users. British e-mail provider MessageLabs.com has reported seeing a number of recent Trojan attacks exploiting a quirk in Outlook Express. The exploit has two features: 1) A fake extension structure intended to get around filtering software. 2) A fake visible extension to trick people into opening an attachment by making it appear safe, when it actually contains a virus or another malicious payload. Full Story
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