Design and Implementation of a Dynamic Metamorphic Engine
Publish place: 7th Sympozium on Advances in Sience & Technology
Publish Year: 1391
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
SASTECH07_099
تاریخ نمایه سازی: 30 تیر 1392
Abstract:
It is shown that the order of appearance of op-codes in malicious codes is different from normal codes. Based on this observation malicious codes are obfuscated by re-ordering their op-codes and making them close to benign code. Similarity test techniques can be applied to measure the similarity of suspicious code with its de-obfuscated or morphed copies. It is observed that the similarity test will decline if the percentage of the similarity of the suspicious code with benign codes is more than 20%. In this paper a new obfuscation algorithm to increase the similarity measure to above 20% is presented. The algorithm applies a supervised learning technique to determine the obfuscation method and to select the suitable benign code for assimilation. The effectiveness of our algorithm is demonstrated by applying two well known classes of antivirus, advanced and advanced+ [13], to detect the original and our obfuscated versions of four famous viruses known as Screen factor, Barfa,Waber and Aphaty.
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Authors
Mehran Khosravi
Iran, Azad University of Broujerd
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