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Malware Analysis
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<blockquote data-quote="Andy Ful" data-source="post: 918280" data-attributes="member: 32260"><p>Sorting the AVs by the sum of missed samples is not an especially good idea, because such a sum is like adding apples to oranges. Anyway, it works here for most AVs (except for Trend Micro and McAfee) if we slightly average the data (in the limit of statistical error):</p><p></p><p>1.Norton (Symantec)........... (<strong>08</strong>------<strong>04</strong>)</p><p>2.F-Secure, Kaspersky......... (<strong>17</strong>------<strong>27</strong>)</p><p>3.Avira, Microsoft................ (<strong>39</strong>------<strong>27</strong>)</p><p>4.Avast................................. (<strong>39</strong>------<strong>59</strong>)</p><p></p><p>Now the sorting is OK, similarly to the example:</p><p>1 apple + 3 oranges < 2 apples + 3.5 oranges</p><p>which is equal to:</p><p>1apple < 2 apples</p><p>and</p><p>3 oranges < 3.5 oranges.</p><p></p><p>Including McAfee and Trend Micro requires a more complex sorting method which will depend on the users' habits. For most users we should see something like that:</p><p>1.Norton (Symantec) ................................ 10 points</p><p>2.F-Secure, Kaspersky............................... 20 points</p><p>3.Avast, Avira, Microsoft, <strong><span style="color: rgb(184, 49, 47)">Trend Micro</span></strong>..... 40 points</p><p>4.McAfee ................................................... 80 points</p><p></p><p>Points ~ (missed Real-World) + 1/10 * (missed Malware Protection)</p><p></p><p>The factor 1/10 can be approximately calculated when knowing how often the user's AV alerts about Real-World and Malware Protection samples (for example a=1, b=3 parameters). This will give:</p><p>(b/a)*(7340/213000) ~ 1/10</p><p></p><p>For a=b</p><p>(b/a)*(7340/213000) ~ 1/30</p><p>1.Norton (Symantec) ................................ 10 points</p><p>2.F-Secure, Kaspersky, <span style="color: rgb(184, 49, 47)"><strong>Trend Micro</strong></span>......... 20 points</p><p>3.Avast, Avira, Microsoft, ......................... 40 points</p><p>4.McAfee ................................................... 80 points</p><p></p><p>For people who use frequently flash drives, pirated software, and cracks the parameters can be a=1, b=10</p><p>(b/a)*(7340/213000) ~ 0, 345</p><p>1.Norton (Symantec) .................................10 points</p><p>2.F-Secure, Kaspersky ...............................25 points</p><p>3.Avast, Avira, Microsoft, ...........................50 points</p><p>4.McAfee, <span style="color: rgb(184, 49, 47)"><strong>Trend Micro</strong></span>...............................95 points</p><p></p><p>With error += 6 points.</p></blockquote><p></p>
[QUOTE="Andy Ful, post: 918280, member: 32260"] Sorting the AVs by the sum of missed samples is not an especially good idea, because such a sum is like adding apples to oranges. Anyway, it works here for most AVs (except for Trend Micro and McAfee) if we slightly average the data (in the limit of statistical error): 1.Norton (Symantec)........... ([B]08[/B]------[B]04[/B]) 2.F-Secure, Kaspersky......... ([B]17[/B]------[B]27[/B]) 3.Avira, Microsoft................ ([B]39[/B]------[B]27[/B]) 4.Avast................................. ([B]39[/B]------[B]59[/B]) Now the sorting is OK, similarly to the example: 1 apple + 3 oranges < 2 apples + 3.5 oranges which is equal to: 1apple < 2 apples and 3 oranges < 3.5 oranges. Including McAfee and Trend Micro requires a more complex sorting method which will depend on the users' habits. For most users we should see something like that: 1.Norton (Symantec) ................................ 10 points 2.F-Secure, Kaspersky............................... 20 points 3.Avast, Avira, Microsoft, [B][COLOR=rgb(184, 49, 47)]Trend Micro[/COLOR][/B]..... 40 points 4.McAfee ................................................... 80 points Points ~ (missed Real-World) + 1/10 * (missed Malware Protection) The factor 1/10 can be approximately calculated when knowing how often the user's AV alerts about Real-World and Malware Protection samples (for example a=1, b=3 parameters). This will give: (b/a)*(7340/213000) ~ 1/10 For a=b (b/a)*(7340/213000) ~ 1/30 1.Norton (Symantec) ................................ 10 points 2.F-Secure, Kaspersky, [COLOR=rgb(184, 49, 47)][B]Trend Micro[/B][/COLOR]......... 20 points 3.Avast, Avira, Microsoft, ......................... 40 points 4.McAfee ................................................... 80 points For people who use frequently flash drives, pirated software, and cracks the parameters can be a=1, b=10 (b/a)*(7340/213000) ~ 0, 345 1.Norton (Symantec) .................................10 points 2.F-Secure, Kaspersky ...............................25 points 3.Avast, Avira, Microsoft, ...........................50 points 4.McAfee, [COLOR=rgb(184, 49, 47)][B]Trend Micro[/B][/COLOR]...............................95 points With error += 6 points. [/QUOTE]
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