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Malware Prevalence - July 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 15.45%
2 Alureon 9.93%
3 ZeroAccess 8.40%
4 Mywebsearch 7.47%
5 InstallCore 6.60%
6 Zeus (Zbot) 3.45%
7 Gamevance 3.38%
8 Hotbar 2.97%
9 Zusy 2.75%
10 Medfos 1.91%
11 DDoS 1.90%
12 Sasfis 1.72%
13 Virut 1.66%
14 Ransom 1.62%
15 Delf 1.61%
16 Small 1.57%
17 1ClickDownload 1.55%
18 Softomate 1.45%
19 Karagany 1.35%
20 Vundo 1.30%
21 Bundlore 1.22%
22 Toggle 1.20%
23 Sality 1.11%
24 Reveton 1.03%
25 Solimba 0.98%
Note: items in bold are new entries

Infected MBR Prevalence Top 5

# Bootkit Prevalence
1 Pihar 31.70%
2 Alureon 26.79%
3 Mebroot (Sinowal) 17.37%
4 sst 15.93%
5 Shetwirl 2.52%

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

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 July 2012, 9.93% was found infected with the 'Alureon' malware.

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