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Malware Prevalence - September 2012

HitmanPro is a second opinion malware scanner, designed to run alongside existing real-time antivirus programs. Its purpose is to find and remove malware that your existing antivirus program is currently unable to find and/or remove.

The list below is the top malware that HitmanPro found and removed from computers that were protected by up-to-date antivirus programs. It differs from other security companies because this list is about malware that is successful in hiding from or bypassing up-to-date virus protection programs. We are able to compile this list because HitmanPro also records if there was a trusted up-to-date antivirus program on the computer, registered in the Windows Security Center.

Prevalence Top 25

# Malware Prevalence
1 FakeAV 14.83%
2 sst 7.16%
3 Alureon 6.85%
4 ZeroAccess 6.39%
5 Mywebsearch 4.35%
6 Small 4.17%
7 MSILInjector 3.46%
8 Zbot (Zeus, Citadel) 3.03%
9 Sasfis 2.82%
10 Gamevance 2.73%
11 InstallCore 2.67%
12 Hotbar 2.49%
13 Zusy 2.37%
14 Delf 2.22%
15 Symmi 2.01%
16 PornoAsset 1.94%
18 Wimad 1.77%
18 Virut 1.66%
19 Prorat 1.40%
20 DDos 1.34%
21 Vundo 1.28%
22 Sality 1.21%
23 Karagany 1.17%
24 Softomate 1.17%
25 Zwangi 1.04%
Note: items in bold are new entries

Infected Bootkit Prevalence Top 5

# Bootkit Prevalence
1 sst 77.10%
2 Alureon 11.79%
3 Pihar 5.50%
4 Mebroot 1.70%
5 Whistler 0.61%

A bootkit is a variant of a kernel-mode rootkit and modifies the master boot record (MBR) or volume boot record (VBR). They sucessfully subvert 64-bit kernel-mode driver signing in Windows 7.
More information on Wikipedia: Bootkits


Prevalence is the occurrence percentage of a malware family relative to other malware families found on computers protected by an up-to-date antivirus program. For example, of all these infected computers (100%) in September 2012, 7.16% was found infected with the 'sst' malware.

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