The Virus Top Twenty – March 2003



Kaspersky Labs presents the Virus Top 20 for the month of March, 2003.

The percentage shown represents the percentage of registered incidences.








































































position virus percentage by occurrence
1 I-Worm.Klez 37.60%
2 I-Worm.Sobig 10.75%
3 I-Worm.Lentin 9.03%
4 I-Worm.Avron 3.30%
5 Macro.Word97.Thus 2.62%
6 I-Worm.Tanatos 1.38%
7 Macro.Word97.Marker 1.21%
8 Worm.Win32.Opasoft 1.13%
9 I-Worm.Hybris 1.04%
10 Win95.CIH 0.69%
11 Worm.Win32.Randon 0.58%
12 VBS.Redlof 0.57%
13 Backdoor.Death 0.51%
14 Win95.Spaces 0.51%
15 I-Worm.Roron 0.49%
16 Trojan.PSW.Gip 0.49%
17 Backdoor.NetDevil 0.48%
18 Win32.HLLP.Hantaner 0.45%
19 TrojanDropper.Win32.Delf 0.42%
20 TrojanDropper.Win32.Yabinder 0.41%
Other Malicious Programs* 25.33%

*not included in the Top 20

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