What this book covers
Chapter 1, Types of Computer-Based Investigations, introduces to the reader the different topics of computer-based investigations, from criminal acts investigated by the police to potentially illegal actions performed by an employee or third parties and examined by a non-governmental investigator. While the goal is the same—to present evidence about an incident—the methods of the two slightly differ. It is essential for the reader to understand the similarities, that is, being able to present evidence in judicial proceedings, and recognize the differences, that is, search warrant requirements for a government agent.
"Chapter 2: The Forensic Analysis Process" on page vii, The Forensic Analysis Process, details the critical thinking in the planning of providing digital investigative services. This topic will allow the reader to create a strategy to conduct an efficient investigation. The reader will learn to offer different approaches to conduct the investigation depending on the unique set of circumstances for each matter.
Chapter 3, Acquisition of Evidence, explains that digital evidence is one of the most volatile pieces of evidence an investigator can handle. Mishandling of digital evidence can severely impact the investigation. Additionally, you may destroy the entire dataset. This chapter will address how to minimize or eliminate these issues when using a validation process to create a forensic image.
Chapter 4, Computer Systems, explains that the investigator must control the computer processes while acquiring digital evidence. When dealing with the many combinations of operating systems and hardware, you must implement controls to protect the integrity of the evidence. This chapter will discuss the boot process in detail and identify the most commonly used filesystems.
Chapter 5, Computer Investigation Process, explains that being a forensic examiner is much more than pushing a button. Once the evidence has been collected, you have to analyze the dataset. It is not about finding artifacts but rather examining the data and putting it into a context that will either support or not support the hypothesis about the user's actions on the system.
Chapter 6, Windows Artifact Analysis, explains that Microsoft Windows is by far the most common operating system today. In this chapter, we will look at the different versions of Windows and will show the reader how to identify and recover common artifacts based on the release of Windows being examined.
Chapter 7, RAM Memory Forensic Analysis, covers the analysis of RAM, which is a source of evidence that has recently been recognized to contain vital information about the user's actions on the system. RAM is very volatile evidence and can provide data that cannot be found anywhere else on the computer system.
Chapter 8, Email Forensics — Investigation Techniques, discusses email, which is a part of everyday life. This communication vector can be one of the primary communication tools for the majority of the population. These communications can contain incredible amounts of data related to an investigation. The investigator must be able to reconstruct the path that email took from the source to the destination to determine its validity.
Chapter 9, Internet Artifacts, explains that using the internet is a daily activity for the majority of the population. Like any other activity, the internet can be used for legal, law-abiding business, or for criminal activity. The internet can be accessed in a variety of ways. The forensic investigator must be able to analyze all these different aspects of the internet to get to the truth of the matter.
Chapter 10, Report Writing, covers report writing, which is not the most exciting portion of the forensic exam process. The forensic examiner must be able to explain a technical topic to a non-technical user. As a forensic examiner, you must be able to place that artifact into a context that the audience understands. This ability is a critical skill that you need to master to be a competent forensic examiner.
Chapter 11, Expert Witness Ethics, explains that a forensic examiner must be objective, truthful, honest, and perform their due diligence when conducting an examination. The examiner will be providing testimony that may result in someone losing their freedom. The ultimate goal of the investigation conducted by the forensic examiner is to provide testimony or evidence in a judicial or administrative proceeding to stop the cybercriminal's activity.