How can clean webpage get malicious code?

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Dizz

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Jan 27, 2007
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I have a website written entirely in html, with a few simple javascripts ("bookmark", "current date", etc). The site has been up for 8 years with that same format, there have been no problems and I am the only person who works on it or has access to the directory.

In the past couple days I've received 3 emails from visitors telling me that their anti-virus was throwing up a flag about the homepage. For example, one of the people said:

"I get the following message from my virus protection: Virus and Spy protection has detected Trojan-Downloader.html.agent.ag virus on your computer."

When I downloaded the index.html page, sure enough there WAS a javascript inserted at the very top (above the doctype)! How can this possibly happen when I'm the only person who works on the page or has access to the directory (other than the hosting service itself)?? And as I said, there have been no significant coding changes on my end since 1999!

Any insight is much appreciated....

:confused:

.............................................
 
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