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Blackberry File Detetion and Thumbnail Caches


Blackberry File Detetion and Thumbnail Caches

BlackBerry devices are not typically welcome arrivals within a forensic lab; their robust security often making examination difficult. In this article we will look at some interesting aspects of the FAT implementation used in BlackBerry devices, and how thumbnail caches can provide a valuable source of evidence.


In situations where access to data within a BlackBerry handset itself is not immediately available (for example, due to an active device password), the recovery of live and deleted data from the memory card becomes even more important. There is nothing too surprising about how Research In Motion (or RIM as the BlackBerry manufacturer is more commonly referred to) has provided removable storage within modern BlackBerry handsets. A microSD card is used, formatted using Microsoft’s FAT fi le system; a solution which is ubiquitous within the industry due to the widespread compatibility of FAT. Naturally the first step is to create (and hash) a forensic image of the card such that analysis and evidence recovery can take place.




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Coming up in the Next issue of Digital Forensics Magazine

Coming up in Issue 34 on sale from February 2018:


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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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