Device operating systems have become more advanced, and the storage capacity on the current devices is astronomical. “Mobile device forensics is likely the most rapidly advancing discipline that digital forensics has ever seen or ever will see, primarily because of the rapidly changing environment of the actual devices. What current technologies are used to access, extract and analyse data from mobile phones?
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In evaluating MPE technologies, this project looks at some of the vulnerabilities used to obtain data, particularly for Android phones, such as the use of Emergency Download Mode for devices with the Qualcomm chipset. “The variety of the operating system versions and the hardware platforms on which they are used provide a wide range of data extraction methods. This causes many Android phones to be running older versions of the operating systems which means various forms of extraction are viable. “We want to start with the bad news: if you are examining an iPhone that runs iOS 8 or newer … chances to unlock it are not good at all.With iOS 11 this problem becomes even more severe - even if the device under examination is not passcode-protected, the examiner will need the passcode anyway as it must be entered to confirm the trust between the device and your workstation.”Īn important differentiator between iOS and Android in terms of forensics capabilities is that whilst Apple can push updates directly to their users, patching vulnerabilities and exploits, Android users are predominantly reliant on the manufacturer and carrier to provide update. Mobile phone extraction could be characterised as an arms race, where vendors are constantly seeking to overcome obstacles of increased phone security.
As USB restricted mode develops with iOS releases, for many in the world of forensics it is simply a challenge to overcome. “.without the passcode we can hardly extract anything from the modern iOS device.” For example iOS’s USB restricted mode, which first appeared in iOS 11.4.1, disabled USB communications after one hour of the last unlock which causes issues of those conducting an extraction. “According to IDC, in the first quarter of 2017, Android dominated the industry with an 85% market share.” iOS leads the way in relation to security and presents the biggest forensic challenge.
Android is the leading operating system for phones worldwide.
Our analysis focuses on Android and iOS when looking at extractive technologies. Whilst forensics experts, hackers and those selling spyware may be able to access and extract data, we look at a number of the most well-known commercial companies who sell their products to law enforcement, such as Cellebrite, Oxygen Forensic Detective, and MSAB. Mobile Phone Extraction technologies, known also as mobile forensics, entails the physical connection of the mobile device that is to be analysed and a device that extracts, analyses and presents the data contained on the phone. General explanation of mobile phone extraction Just as new security features are announced for phones, so too new methods to extract data are found. We welcome input from experts in the field.
In this piece we examine mobile phone extraction, relying on publicly available information and Privacy International’s experience from conducting mobile phone extraction using a Cellebrite UFED Touch 2.
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