The Virus Top Twenty - May 2003

02 Jun 2003
Virus News


Kaspersky Lab presents the Virus Top 20 for the month of May 2003. The percentage shown represents the percentage of registered incidences.
PositionVirusPercentage by Occurrence
1I-Worm.Sobig21.87%
2I-Worm.Lentin15.95%
3I-Worm.Klez15.39%
4I-Worm.Fizzer0.67%
5I-Worm.Roron0.51%
6Worm.Win32.Randon0.38%
7I-Worm.Ganda0.28%
8Macro.Word97.Thus0.28%
9Backdoor.Assasin0.24%
10I-Worm.Tanatos0.21%
11Backdoor.Optix0.20%
12Backdoor.IRC.Zcrew0.19%
13Win32.Parite0.17%
14Win32.FunLove0.17%
15Backdoor.IRC.Flood0.16%
16TrojanDropper.JS.Mimail0.16%
17VBS.Redlof0.15%
18Backdoor.IRC.mIRC-based0.14%
19Backdoor.SdBot.gen0.12%
20TrojanDownloader.Win32.Swizzor0.12%
Other Malicious Programs*42.66%

*not included in the Top 20 Malicious Program Types