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Mac Memory Forensics

Written by DFMag


Mac Memory Forensics

WeChat Analysis on a live system, Kelvin Wong investigates...

Rapid growth of the use of Mac OS X requires forensics researchers to analyse devices such as iPad, iPhone and Mac in depth. OS X forensics really started with Jonathan Zdziarski in 2008, but soon became widespread with most of the research and training focused on file system analysis. There are a number of tools available to analyse OS X, e.g. Volatility, Volafox, Memoryze for Mac, Mac Memory Reader, MacLockPick and Rekall, however the ability to analyse Mac memory will be complex and disconcerting to the novice. We have attempted in this article to demonstrate a fast track method of Mac memory forensic analysis by studying the evidence of a very popular Chinese social networking application ‘WeChat’. Memory Forensics is the art of analyzing computer memory (RAM) to solve digital crimes’ defined by Michael Hale Ligh, Andrew Case and, Jamie Levy. Computer forensics science is not only considered a science but an art. With the global use of smart phones and the Internet, a great number of individuals now communicate with their friends using some form of mobile social networking application, e.g. ‘Facebook, Whatsapp, SnapChat etc.’ In China and surrounding countries, especially Hong Kong, the most famous and commonly used chatting platform is WeChat. These applications provide not only a smart phone but also a desktop version. Therefore, we cannot ignore any possibility of evidence in either the file system or memory from a desktop machine. Memory analysis is an important intersection, therefore in this article we will examine the memory dump from a Mac machine, by acquisition, process analysis and data collection through an example of running WeChat on OS X.




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Dr Tim Watson is the head of the Department of Computer Technology at De Montfort University

 

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Coming up in Issue 32 on sale from August 2017:


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