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The Virus Top Twenty - May 2003

02 Jun
Virus News

Kaspersky Lab presents the Virus Top 20 for the month of May 2003. The percentage shown represents the percentage of registered incidences.

Position	Virus	Percentage by Occurrence
1	I-Worm.Sobig	21.87%
2	I-Worm.Lentin	15.95%
3	I-Worm.Klez	15.39%
4	I-Worm.Fizzer	0.67%
5	I-Worm.Roron	0.51%
6	Worm.Win32.Randon	0.38%
7	I-Worm.Ganda	0.28%
8	Macro.Word97.Thus	0.28%
9	Backdoor.Assasin	0.24%
10	I-Worm.Tanatos	0.21%
11	Backdoor.Optix	0.20%
12	Backdoor.IRC.Zcrew	0.19%
13	Win32.Parite	0.17%
14	Win32.FunLove	0.17%
15	Backdoor.IRC.Flood	0.16%
16	TrojanDropper.JS.Mimail	0.16%
17	VBS.Redlof	0.15%
18	Backdoor.IRC.mIRC-based	0.14%
19	Backdoor.SdBot.gen	0.12%
20	TrojanDownloader.Win32.Swizzor	0.12%
Other Malicious Programs*		42.66%

*not included in the Top 20 Malicious Program Types