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This is the accepted version of the paper.This version of the publication may differ from the final published version. Abstract-Android smartphones are gaining big market share due to several reasons, including open architecture and popularity of its application programming interfaces (APIs) in developer community. In general, smartphone has become pervasive due to its cost effectiveness, ease of use and availability of office applications, Internet, games, vehicle guidance using locationbased services apart from conventional voice calls, messaging and multimedia services. Permanent

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Popularity and growth of Android mobile devices has paved the way for exploiting popular apps using various Dalvik bytecode transformation methods. Testing the antimalware techniques against obfuscation identifies the need of proposing effective detection methods. In this paper, we explore the resilience of anti-malware techniques against transformations for Android. The Proposed approach employs variable compression, native code wrapping and register renaming, in addition to already implemented transformations on Dalvik bytecode. Evaluation results indicate low resilience of the antimalware detection engines against code obfuscation. Furthermore, we evaluate resilience of Androguard's code similarity and AndroSimilar's robust statistical feature signature against code obfuscated malware.

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