Malwares are growing rapidly on the internet. Malware code analysis is very crucial part of any defense system. Malware authors use Obfuscation to make the analysis difficult. It is an Obfuscate and De-obfuscate game between malware authors and researchers. Traditionally, malware analysis has been a manual process that is tedious and time-consuming. Malware authors use different techniques to bypass AV Engines and uses obfuscate techniques to prevent their code from reverse engineering. In this paper, we present the different packers to obfuscate the malware. We present some obfuscated technique to evade AV and some automated tool which can make the process easier for script kiddies