Only one new piece of malware was prevalent enough to make it into the 10 most-active viruses last month as users continued to ignore updates, according to anti-virus vendor Sophos.
Email users are still being tricked by Zafi.d, the mass-mailing Christmas e-card virus that keeps topping the malware charts.
Netsky-P tops the list of the worst virus outbreaks in 2004--a year marked with nearly a 52 percent increase in new viruses, according to a report released Wednesday by security software maker Sophos.
The latest variant of the Zafi worm was discovered on Wednesday and unlike the previous two variants, Zafi.C has been coded to launch a DDoS attack against Google.com, Microsoft.com and miniszterelnok.hu, which is the Web site of the Hungarian Prime Minister.
Pornographic e-mails have shot up by almost 350 percent since June, according to security solutions provider Clearswift's latest spam index.
The latest variant of the Zafi worm was discovered on Wednesday and unlike the previous two variants, Zafi.C has been coded to launch a DDoS attack against Google.com, Microsoft.com and miniszterelnok.hu, which is the Web site of the Hungarian Prime Minister.
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