Book Image

Mastering Kali Linux for Advanced Penetration Testing, Second Edition - Second Edition

By : Vijay Kumar Velu
Book Image

Mastering Kali Linux for Advanced Penetration Testing, Second Edition - Second Edition

By: Vijay Kumar Velu

Overview of this book

This book will take you, as a tester or security practitioner through the journey of reconnaissance, vulnerability assessment, exploitation, and post-exploitation activities used by penetration testers and hackers. We will start off by using a laboratory environment to validate tools and techniques, and using an application that supports a collaborative approach to penetration testing. Further we will get acquainted with passive reconnaissance with open source intelligence and active reconnaissance of the external and internal networks. We will also focus on how to select, use, customize, and interpret the results from a variety of different vulnerability scanners. Specific routes to the target will also be examined, including bypassing physical security and exfiltration of data using different techniques. You will also get to grips with concepts such as social engineering, attacking wireless networks, exploitation of web applications and remote access connections. Later you will learn the practical aspects of attacking user client systems by backdooring executable files. You will focus on the most vulnerable part of the network—directly and bypassing the controls, attacking the end user and maintaining persistence access through social media. You will also explore approaches to carrying out advanced penetration testing in tightly secured environments, and the book's hands-on approach will help you understand everything you need to know during a Red teaming exercise or penetration testing
Table of Contents (15 chapters)

Mapping beyond the firewall

Attackers normally start network debugging using the traceroute utility, which attempts to map all the hosts on a route to a specific destination host or system. Once the target is reached, as the TTL field will be zero, the target will discard the datagram and generate an ICMP time exceeded packet back to its originator. A regular traceroute will be as follows:

As you can see from the preceding example, we cannot go beyond a particular IP, which most probably means that there is a packet filtering device at hop 4. Attackers would dig a little bit deeper to understand what is deployed on that IP.

Deploying the default UDP datagram option will increase the port number every time it sends an UDP datagram. Hence, attackers will start pointing a port number to reach the final target destination.