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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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Scott C. Zimmerman

Scott C. Zimmerman is a CISSP qualified Information Security consultant and presenter

 

Coming up in the Next issue of Digital Forensics Magazine

Coming up in Issue 34 on sale from February 2018:


Device Forensics in the Internet of Things

As more businesses and consumers adopt IoT devices, privacy violations and cyber-attacks by malicious actors will become commonplace due to the insecure IoT infrastructure. Read More »

Data Destruction In Current Hard Disks & Data Destruction Techniques

Data destruction is a process traditionally applied using physical techniques, aiming at the completely destruction of the hard disk, however, there is an increasing interest in the use of logical techniques for data destruction, that allow reusing the physical device. Read More »

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Faster Searching For Known Illegal Content

Cryptographic (“MD5”) hash searching for known illegal material is one of the most thorough methods of digital forensic investigation. However, the technique is hampered by the ever-increasing size of media being examined, and the size of the hash list being searched. Read More »

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