Book Image

Learning Network Forensics

By : Samir Datt
Book Image

Learning Network Forensics

By: Samir Datt

Overview of this book

We live in a highly networked world. Every digital device—phone, tablet, or computer is connected to each other, in one way or another. In this new age of connected networks, there is network crime. Network forensics is the brave new frontier of digital investigation and information security professionals to extend their abilities to catch miscreants on the network. The book starts with an introduction to the world of network forensics and investigations. You will begin by getting an understanding of how to gather both physical and virtual evidence, intercepting and analyzing network data, wireless data packets, investigating intrusions, and so on. You will further explore the technology, tools, and investigating methods using malware forensics, network tunneling, and behaviors. By the end of the book, you will gain a complete understanding of how to successfully close a case.
Table of Contents (17 chapters)
Learning Network Forensics
About the Author
About the Reviewers

Identifying sources of evidence

For any successful investigation, it is extremely important to successfully collect, collate, preserve, and analyze the evidence.

To begin with, we need to identify the sources of evidence for any investigation.

The sources of evidence can be easily divided into the following two categories:

Evidence obtainable from within the network

Consider the following image:

This can include the following:

  • Evidence from network & device logs:

    A log is a record of all the activities and outcomes performed by a device or by outside agents on a device. Thus, all the incoming or outgoing events are logged on a system. Logs are a crucial part of the investigation ecosystem.

    Devices such as firewalls, intrusion prevention and detection systems, anti-virus servers, and so on generate logs. Other logs include operating system event logs, application logs, and so on.

  • Network traffic:

    As discussed in the previous chapter, network traffic is transmitted in packets. The data is split...