Security Slideshow: Why CIOs Are Right to Worry About Security

Why CIOs Are Right to Worry About Security

One in 218.7 E-mails sent in September 2010 contained malware, Symantec found. That's an increase of 0.15% over August 2010.

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During September, one out of 382 E-mails was a phishing attack (a slight decline of 0.01% compared to August).

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33.6% of all the Web sites blocked in September by software running on corporate computers were new domains.

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A whopping 21.8% of all Web-based malware was new this month.

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Mobile workers are 5.4 times more likely to download potentially dangerous content than those in the office.

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Mobile workers are more than twice as likely to access potentially dangerous streaming media than while at the office.

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The "global ratio of spam in E-mail traffic" was 91.9 percent in September.

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United States e-mail traffic is overrun with spam. In fact, Symantec found that 92.1% of all E-mail was spam in September.

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The automotive industry had a spam rate of 94.1%, easily besting other industries in September.

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92% of all E-mail traffic in the IT services industry was spam in September.

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The public sector continues to be the most-targeted industry for malware. One in 35.8 e-mails contained malware in September.

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The public sector was also most likely to be attacked by phishing scams. One in every 78.1 E-mails in the public sector are phishing attacks.

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W32.Sality.AE was the most blocked malware in September. It was followed by W32.Downandup.B.

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Out of 4.1 billion SMTP connections in September, Symantec "throttled back" 59.7% of those connections because they contained "malicious or unwanted" content.

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Legitimate sites accounted for a whopping 80% of Web sites blocked by corporate software due to malicious content, according to Symantec.