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Top Ten Viruses Reported to Sophos in July 2003

  • 31 July, 2003 23:07

<p>Sobig family dominates this month's chart</p>
<p>This is the latest in a series of monthly charts counting down the ten most frequently occurring viruses and hoaxes as compiled by Sophos, a global leader in anti-virus protection for businesses.</p>
<p>For July 2003, the chart is as follows, with the most frequently occurring virus at number one:</p>
<p>1. W32/Sobig-E (Sobig variant) 47.8% New Entry</p>
<p>2. W32/Bugbear-B (Bugbear variant) 11.0%</p>
<p>3. W32/Klez-H (Klez variant) 5.9% 18 months in chart</p>
<p>4. W32/Sobig-A (Sobig worm) 2.7%</p>
<p>5= W32/Parite-B (Parite variant) 0.9% New Entry</p>
<p>5= W32/Sobig-B (Sobig variant) 0.9%</p>
<p>7. W32/Ganda-A (Ganda worm) 0.8% New Entry</p>
<p>8= W32/Opaserv-G (Opaserv variant) 0.7%</p>
<p>8= W32/Sobig-D (Sobig variant) 0.7% New Entry</p>
<p>8= W95/Dupator (Dupator worm) 0.7% New Entry</p>
<p>Others: 27.9%</p>
<p>"Even though Sobig-E is easily stopped at email gateways, it's still responsible for almost half the infections reported this month," said Paul Ducklin, Sophos's Sydney-based Head of Technology, Asia Pacific. "That's because Sobig is network aware as well as email aware, so it can't be prevented by email measures alone. More than half of this month's Top Ten are network aware, which underlines the importance of keeping your anti-virus protection up to date right across the network."</p>
<p>Sophos detected 625 new viruses, worms and Trojan horses in July. The total number it now protects against is 83, 499.</p>
<p>Sophos has made available a free, constantly updated information feed for intranets and websites which means users can always find out about the latest viruses and hoaxes:</p>
<p>Graphics of the above Top Ten virus chart are available at:</p>
<p>For more information about safe computing, including anti-hoax policies, please visit:</p>
<p>Paul Ducklin ( is available for comment:
+61 407 320 515 (mobile)
+61 2 9409 9100 (tel)
+61 2 9409 9191 (fax)</p>
<p>Sophos's press contact at Gotley Nix Evans is:
Michael Henderson (
+61 2 9957 5555 (tel)
+61 413 054 738 (mobile)
+61 2 9957 5575 (fax)</p>

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