Skip to main content

The Virus Top Twenty - September 2003

1 October 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
Kaspersky logo

About Kaspersky

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 businesses, critical infrastructure, governments and consumers around the globe. The company’s comprehensive security portfolio includes leading endpoint protection, specialized security products and services, as well as Cyber Immune solutions to fight sophisticated and evolving digital threats. We help over 200,000 corporate clients protect what matters most to them. Learn more at www.kaspersky.com.

Related Articles Press Releases