Book Image

Digital Forensics and Incident Response - Third Edition

By : Gerard Johansen
5 (1)
Book Image

Digital Forensics and Incident Response - Third Edition

5 (1)
By: Gerard Johansen

Overview of this book

An understanding of how digital forensics integrates with the overall response to cybersecurity incidents is key to securing your organization’s infrastructure from attacks. This updated third edition will help you perform cutting-edge digital forensic activities and incident response with a new focus on responding to ransomware attacks. After covering the fundamentals of incident response that are critical to any information security team, you’ll explore incident response frameworks. From understanding their importance to creating a swift and effective response to security incidents, the book will guide you using examples. Later, you’ll cover digital forensic techniques, from acquiring evidence and examining volatile memory through to hard drive examination and network-based evidence. You’ll be able to apply these techniques to the current threat of ransomware. As you progress, you’ll discover the role that threat intelligence plays in the incident response process. You’ll also learn how to prepare an incident response report that documents the findings of your analysis. Finally, in addition to various incident response activities, the book will address malware analysis and demonstrate how you can proactively use your digital forensic skills in threat hunting. By the end of this book, you’ll be able to investigate and report unwanted security breaches and incidents in your organization.
Table of Contents (28 chapters)
1
Part 1: Foundations of Incident Response and Digital Forensics
6
Part 2: Evidence Acquisition
11
Part 3: Evidence Analysis
17
Part 4: Ransomware Incident Response
20
Part 5: Threat Intelligence and Hunting
Appendix

Types of incident investigation analysis

Digital investigations are not all the same. There are a variety of reasons that a Computer Security Incident Response Team (CSIRT) will stop an investigation based on the time allowed, the type of incident, and the overall goal of the investigation. It makes no sense for two or three CSIRT analysts to spend a full day investigating a small-scale malware outbreak. On the other hand, a network intrusion where the adversary has been in the network for three months will require a much more detailed examination of the evidence to determine how the adversary was able to gain access, what information they aggregated and exfiltrated, and what the impact on the organization has been.

The result is that there are several different types of incident investigations conducted by various individuals within an organization. Figure 4.2 shows the five layers and the personnel involved, along with the corresponding time and the necessary investigative resources...