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The Virus Top Twenty - September 2003

October 1, 2003

Kaspersky Labs presents the twenty most widespread viruses for September 2003


Kaspersky Lab presents the twenty most widespread viruses for September 2003
PositionChangeVirus NamePercentage by Occurrence
1=I-Worm.Sobig44.75%
2newI-Worm.Swen36.50%
3- 1I-Worm.Mimail6.50%
4+ 1I-Worm.Klez2.52%
5+ 1 I-Worm.Lentin 2.35%
6- 3 I-Worm.Tanatos 0.81%
7new I-Worm.Dumaru 0.68%
8- 4 Worm.Win32.Lovesan 0.35%
9- 2Worm.P2P.SpyBot0.14%
10re-entry Win95.CIH 0.11%
11= Backdoor.SdBot 0.09%
12re-entry I-Worm.Ganda 0.09%
13= VBS.Redlof 0.08%
14- 2 Win32.Parite 0.08%
15+ 4 Worm.Win32.Welchia 0.08%
16re-entry Win32.FunLove 0.08%
17- 1 I-Worm.Roron 0.07%
18- 4 Backdoor.Optix.Pro 0.07%
19re-entry I-Wom.Fizzer 0.07%
20- 140.05%
Other Malicious Programs*4.52%
* not included in the Top Twenty
Malicious Program Types

The Virus Top Twenty - September 2003

Kaspersky Labs presents the twenty most widespread viruses for September 2003
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Kaspersky is a global cybersecurity and digital privacy company founded in 1997. With over a billion devices protected to date from emerging cyberthreats and targeted attacks, Kaspersky’s deep threat intelligence and security expertise is constantly transforming into innovative solutions and services to protect individuals, businesses, critical infrastructure, and governments around the globe. The company’s comprehensive security portfolio includes leading digital life protection for personal devices, specialized security products and services for companies, as well as Cyber Immune solutions to fight sophisticated and evolving digital threats. We help millions of individuals and nearly 200,000 corporate clients protect what matters most to them. Learn more at www.kaspersky.com.

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