Book Image

Metasploit Penetration Testing Cookbook - Third Edition

By : Daniel Teixeira, Abhinav Singh, Nipun Jaswal, Monika Agarwal
Book Image

Metasploit Penetration Testing Cookbook - Third Edition

By: Daniel Teixeira, Abhinav Singh, Nipun Jaswal, Monika Agarwal

Overview of this book

Metasploit is the world's leading penetration testing tool and helps security and IT professionals find, exploit, and validate vulnerabilities. Metasploit allows penetration testing automation, password auditing, web application scanning, social engineering, post exploitation, evidence collection, and reporting. Metasploit's integration with InsightVM (or Nexpose), Nessus, OpenVas, and other vulnerability scanners provides a validation solution that simplifies vulnerability prioritization and remediation reporting. Teams can collaborate in Metasploit and present their findings in consolidated reports. In this book, you will go through great recipes that will allow you to start using Metasploit effectively. With an ever increasing level of complexity, and covering everything from the fundamentals to more advanced features in Metasploit, this book is not just for beginners but also for professionals keen to master this awesome tool. You will begin by building your lab environment, setting up Metasploit, and learning how to perform intelligence gathering, threat modeling, vulnerability analysis, exploitation, and post exploitation—all inside Metasploit. You will learn how to create and customize payloads to evade anti-virus software and bypass an organization's defenses, exploit server vulnerabilities, attack client systems, compromise mobile phones, automate post exploitation, install backdoors, run keyloggers, highjack webcams, port public exploits to the framework, create your own modules, and much more.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Contributors
Packt Upsell
Preface
Index

Converting an exploit to a Metasploit module


Now we know how to successfully change a PoC, we can move to the next step and convert the exploit to a Metasploit module. Having a basic knowledge of how to write exploits is essential, since most of the PoCs found online do not come with a manual. That being said, let's move ahead with the recipe and see how we can build our own exploit modules, using an available PoC.

Getting ready

Before we begin with the exploit conversion, it is important to learn how stack-based buffer overflows work.

A stack-based buffer overflow occurs when more data is written to a buffer than it can hold, overrunning the buffer's boundary and overwriting adjacent memory locations.

Looking at the PoC, we can see by sending 2487 characters we can overflow the next SEH and the SEH record:

A Structured Exception Handler (SEH) is an exception handling mechanism. When a program crashes and an exception is triggered, SEH is called to try to recover operations. SEH is a linked list...