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Viruses once took years to spread; now take hours
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"Friends and Family viruses" (actually Trojan horse/worm
programs) spread by exploiting existing relationships
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Most common in 3Q 2000: Hybris, Sircam.
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Most infect Windows
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Some malware carries a destructive payload
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Can easily overload mail systems
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Buffer overflow and active content exploits pose serious
threats to users' systems and privacy
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New threat: "Web bugs" in e-mail
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