Book Image

Mastering Python Forensics

Book Image

Mastering Python Forensics

Overview of this book

Digital forensic analysis is the process of examining and extracting data digitally and examining it. Python has the combination of power, expressiveness, and ease of use that makes it an essential complementary tool to the traditional, off-the-shelf digital forensic tools. This book will teach you how to perform forensic analysis and investigations by exploring the capabilities of various Python libraries. The book starts by explaining the building blocks of the Python programming language, especially ctypes in-depth, along with how to automate typical tasks in file system analysis, common correlation tasks to discover anomalies, as well as templates for investigations. Next, we’ll show you cryptographic algorithms that can be used during forensic investigations to check for known files or to compare suspicious files with online services such as VirusTotal or Mobile-Sandbox. Moving on, you’ll learn how to sniff on the network, generate and analyze network flows, and perform log correlation with the help of Python scripts and tools. You’ll get to know about the concepts of virtualization and how virtualization influences IT forensics, and you’ll discover how to perform forensic analysis of a jailbroken/rooted mobile device that is based on iOS or Android. Finally, the book teaches you how to analyze volatile memory and search for known malware samples based on YARA rules.
Table of Contents (14 chapters)

Using virtualization as a source of evidence


Virtualization is not just dangerous and challenging when it comes to forensic investigations, there is also the potential to use virtualization as a tool for gathering forensic evidence. In the following sections, you will see various sources which can lead to the evidence.

Creating forensic copies of RAM content

Normally, creating a copy of a system's RAM contents requires access to the target system, a logon, installing the required tools, and copying away the RAM dump to an external media. All of these steps are intrusive, that is, changing the state of the system and being subject to detection by the attacker or his malware. Furthermore, an attacker with administrative privileges may hide portions of the system memory from the memory dumps, for example, by manipulating the memory allocation and protection algorithms.

To overcome the disadvantages of this method, the hypervisor layer can be utilized to get a complete, non-tampered copy of the...