Monthly Malware Statistics: December 2009

Malicious programs detected on users’ computers

The first Top Twenty lists malicious programs, adware and potentially unwanted programs that were detected and neutralized when accessed for the first time, i.e. by the on-access scanner.

Position Change in position Name Number of infected computers
1 0 Net-Worm.Win32.Kido.ir 265622
2 0 Net-Worm.Win32.Kido.iq 211101
3 0 Net-Worm.Win32.Kido.ih 145364
4 0 Virus.Win32.Sality.aa 143166
5 0 Worm.Win32.FlyStudio.cu 101743
6 New not-a-virus:AdWare.Win32.GamezTar.a 63898
7 -1 not-a-virus:AdWare.Win32.Boran.z 61156
8 -1 Trojan-Downloader.Win32.VB.eql 61022
9 -1 Trojan-Downloader.WMA.GetCodec.s 56364
10 New Trojan.Win32.Swizzor.c 54811
11 New Trojan-GameThief.Win32.Magania.cpct 42676
12 -3 Virus.Win32.Virut.ce 45127
13 -3 Virus.Win32.Induc.a 37132
14 0 Trojan-Dropper.Win32.Flystud.yo 33614
15 3 Packed.Win32.Krap.ag 31544
16 -3 Packed.Win32.Black.a 31340
17 0 Worm.Win32.Mabezat.b 31020
18 -2 Packed.Win32.Klone.bj 28814
19 -7 Packed.Win32.Black.d 28560
20 -5 Worm.Win32.AutoRun.dui 28551