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Introducing Network Forensics

Network forensics is one of the sub-branches of digital forensics where the data being analyzed is the network traffic going to and from the system under observation. The purposes of this type of observation are collecting information, obtaining legal evidence, establishing a root-cause analysis of an event, analyzing malware behavior, and so on. Professionals familiar with digital forensics and incident response (DFIR) know that even the most careful suspects leave traces and artifacts behind. But forensics generally also includes imaging the systems for memory and hard drives, which can be analyzed later. So, how do network forensics come into the picture? Why do we need to perform network forensics at all? Well, the answer to this question is relatively simple.

Let's consider a scenario where you are hunting for some unknown attackers in a...

Key benefits

Investigate network threats with ease

Practice forensics tasks such as intrusion detection, network analysis, and scanning

Learn forensics investigation at the network level

Description

Network forensics is a subset of digital forensics that deals with network attacks and their investigation. In the era of network attacks and malware threat, it’s now more important than ever to have skills to investigate network attacks and vulnerabilities. Hands-On Network Forensics starts with the core concepts within network forensics, including coding, networking, forensics tools, and methodologies for forensic investigations. You’ll then explore the tools used for network forensics, followed by understanding how to apply those tools to a PCAP file and write the accompanying report. In addition to this, you will understand how statistical flow analysis, network enumeration, tunneling and encryption, and malware detection can be used to investigate your network. Towards the end of this book, you will discover how network correlation works and how to bring all the information from different types of network devices together. By the end of this book, you will have gained hands-on experience of performing forensics analysis tasks.

Who is this book for?

The book targets incident responders, network engineers, analysts, forensic engineers and network administrators who want to extend their knowledge from the surface to the deep levels of understanding the science behind network protocols, critical indicators in an incident and conducting a forensic search over the wire.

What you will learn

Discover and interpret encrypted traffic

Learn about various protocols

Understand the malware language over wire

Gain insights into the most widely used malware

Correlate data collected from attacks

Develop tools and custom scripts for network forensics automation

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