Detection system and method of suspicious malicious website using analysis of javascript obfuscation strength
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United States of America Patent
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Jun 17, 2014
Grant Date -
Jun 21, 2012
app pub date -
Oct 27, 2011
filing date -
Dec 21, 2010
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Abstract
A detection system of a suspicious malicious website using the analysis of a JavaScript obfuscation strength, which includes: an entropy measuring processor of measuring an entropy of an obfuscated JavaScript present in the website, a special character entropy, and a variable/function name entropy; a frequency measuring processor of measuring a specific function frequency, an encoding mark frequency and a % symbol frequency of the JavaScript; a density measuring processor of measuring the maximum length of a single character string of the JavaScript; and a malicious website confirming processor of determining whether the relevant website is malicious by comparing an obfuscation strength value, measured by the entropy measuring processor, the frequency measuring processor and the density measuring processor, with a threshold value.
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