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Written by Daniel   
Tuesday, 17 October 2006 14:27
Malware: The Undead
Dark Reading

OCTOBER 17, 2006 | Is there life after death? If you're malicious HTML code, there might be.

Researchers at Finjan Software Inc. say they have uncovered several instances in which malware from previously disabled Web sites or pages has reappeared, served up by caching systems that don't recognize the trouble.

"Such 'infection-by-proxy' introduces new risks for businesses," says Finjan's Malicious Code Research Center in its quarterly Web security trends report. "This is more than just a theoretical danger -- Finjan has already found such a scenario being used in the wild."

ISPs, search engines, and large enterprises often create large stores of cached Web pages on their systems to provide backup when a Web page is unavailable or slow to load, Finjan observes. These duplicate pages live on, even after a malicious site has been taken down or quarantined.

 

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