Mastering Mobile Forensics by Soufiane Tahiri

Author:Soufiane Tahiri [Tahiri, Soufiane]
Language: eng
Format: azw3, pdf
Publisher: Packt Publishing
Published: 2016-05-30T04:00:00+00:00

Before starting our bypass and lock cracking techniques, dealing with system files or "system protected files" assumes that the device you are handling meets some requirements:

Using Android Debug Bridge (ADB):The device must be rooted

USB debugging is enabled on the device

Booting into a custom recovery mode

JTAG or chip-off to acquire a physical bit-by-bit copy

Bootloader/recovery mode

Besides the normal booting process of Android, there are some maintenance modes: fastboot (also called bootloader) and recovery mode. Either of the two can be accessed via the start-up key combination (depending on the device model) or via ADB commands.

Bootloader, or fastboot, is a BIOS-like system that packages the instructions to boot an operating system kernel and is designed to run its own debugging environment. Bootloader is extremely processor specific since it's the very first layer that has to be executed; every Android device has a bootloader, but depending on the hardware device, most of the OEMs have their own version especially designed for their hardware. That's why most of the bootloaders are "locked". This is meant to force users to stick with the Android version shipped within the device.

Bootloader in Android has a basic interactive mode and can be accessed in different ways depending on the device; the following is a list of the most common devices and how to get them to boot into fastboot mode:

Device

Instruction

Image

Download

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