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Malware Prevalence - April 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 an up-to-date antivirus program on the computer, registered in the Windows Security Center.

Prevalence Top 25

# Malware Prevalence
1 FakeAV 14,21%
2 Mywebsearch 8,50%
3 Alureon 8,37%
4 ZeroAccess (Sirefef) 6,05%
5 InstallCore 5,72%
6 Pihar 4,12%
7 Zeus (Zbot) 3,66%
8 Hotbar 2,87%
9 Sasfis 2,72%
10 Mebroot 2,63%
11 Virut 2,37%
12 SearchSuite 2,08%
13 Gamevance 1,97%
14 Delf 1,93%
15 Hacktool 1,62%
16 Sality 1,61%
17 Softomate 1,59%
18 Wimad 1,55%
19 Medfos 1,49%
20 Small 1,47%
21 Bundlore 1,44%
22 Tibs 1,29%
23 Ransom 1,24%
24 Vundo 1,20%
25 Solimba 1,16%
Note: items in bold are new entries

Infected MBR Prevalence Top 5

# Bootkit Prevalence
1 Pihar 59,88%
2 Mebroot (Sinowal) 19,73%
3 Alureon 15,88%
4 sst 1,70%
5 Shetwirl 1,30%

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

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