The Virus Top Twenty – August 2003

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

The percentage shown represents the percentage of registered incidences.


































































Position Virus Percentage by Occurrence
1 I-Worm.Sobig 61.49%
2 I-Worm.Mimail 4.06%
3 I-Worm.Tanatos 3.49%
4 Worm.Win32.Lovesan 3.17%
5 I-Worm.Klez 1.09%
6 I-Worm.Lentin 0.67%
7 Worm.P2P.SpyBot 0.66%
8 Macro.Word97.Thus 0.60%
9 Macro.Word97.Saver 0.60%
10 Backdoor.BeastDoor 0.50%
11 Backdoor.SdBot 0.48%
12 Win32.Parite 0.41%
13 VBS.Redlof 0.36%
14 Backdoor.Optix.Pro 0.29%
15 I-Worm.Roron 0.25%
16 TrojanDropper.Win32.Freshbind 0.22%
17 Worm.Win32.Muma 0.20%
18 Win32.Xorala 0.19%
19 Worm.Win32.Welchia 0.19%
20 I-Worm.Gibe 0.19%
Other Malicious Programs* 20.86%


*not included in the Top 20

Malicious Program Types

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