NetSky.P and Zafi.B continue to be the main cause of the number of infections in the past several months, since they appeared in March and June respectively.
NetSky.P accounted for more than a third of the infections reported by the UK security software company Sophos in October. More than one in four was related to the Zafi.B worm, who topped the malicious program rankings. last 4 months. Many tricks used by this virus are the main reason for its success. E-mail containing Zafi.B appears with text messages written in different languages, a factor that causes many people - who are wary of e-mail in English - curious to open attachments with Zafi. .B.
In October, only a new virus, Bagle.Zip, entered the list of the 10 most destructive malicious code. "With the arrival of only one new virus in the top 10, it seems like the dominance of NetSky.P and Zafi. B is unshakeable, "said Sophos' Carole Theriault. "These viruses have spread so widely and gaining a 'position' that other attack programs can not compete with. Thousands of copies are available around the world. It is probably the less secure PCs in areas where computer security is not the top priority that has helped them survive so long. "
In October, Sophos analyzed and blocked 1,131 new viruses, bringing the total number of attacks that they prevented to 96,156. The UK software company said 4.6% (equivalent to 1/22) e-mail transactions in the month containing the virus. The past 31 days can be considered a relatively quiet time in terms of computer security compared to the 9% (1/10 e-mail) of July.
The 10 most dangerous viruses in October 2004 (in parentheses are the reported rates reported by Sophos)
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NetSky.P (35.2%)
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Zafi.B (28%)
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NetSky.D (7%)
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NetSky.Z (5.8%)
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Bagle.AA (4,4%)
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NetSky.B (3.9%)
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NetSky.Q (2.6%)
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MyDoom.O (2.2%)
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NetSky.C (1.9%)
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Bagle.Zip (1%)
Others: 8%
