Book Image

Windows and Linux Penetration Testing from Scratch - Second Edition

By : Phil Bramwell
Book Image

Windows and Linux Penetration Testing from Scratch - Second Edition

By: Phil Bramwell

Overview of this book

Let’s be honest—security testing can get repetitive. If you’re ready to break out of the routine and embrace the art of penetration testing, this book will help you to distinguish yourself to your clients. This pen testing book is your guide to learning advanced techniques to attack Windows and Linux environments from the indispensable platform, Kali Linux. You'll work through core network hacking concepts and advanced exploitation techniques that leverage both technical and human factors to maximize success. You’ll also explore how to leverage public resources to learn more about your target, discover potential targets, analyze them, and gain a foothold using a variety of exploitation techniques while dodging defenses like antivirus and firewalls. The book focuses on leveraging target resources, such as PowerShell, to execute powerful and difficult-to-detect attacks. Along the way, you’ll enjoy reading about how these methods work so that you walk away with the necessary knowledge to explain your findings to clients from all backgrounds. Wrapping up with post-exploitation strategies, you’ll be able to go deeper and keep your access. By the end of this book, you'll be well-versed in identifying vulnerabilities within your clients’ environments and providing the necessary insight for proper remediation.
Table of Contents (23 chapters)
1
Part 1: Recon and Exploitation
9
Part 2: Vulnerability Fundamentals
17
Part 3: Post-Exploitation

Fuzzy registers – the low-level perspective

The fuzzing research we’ve done so far was effective in discovering the fact that these two FTP programs are vulnerable to overflows. Now, we need to understand what’s happening behind the scenes by watching the stack as we send fuzz payloads. Of course, this will be done with a debugger. Since we’re on Windows in this lab, we’ll fire up WinDbg and attach it to the vulnerable software PID. Since we’ve just finished toying around with the nfsAxe client, I’ll assume that’s still up and ready to go in your lab. Keep your 3Com Daemon lab handy, though, because the principles are the same. Let’s go down the rabbit hole with Metasploit’s offset discovery duo: pattern_create and pattern_offset.

Calculating the EIP offset with the Metasploit toolset

Head on over to the tools directory in Metasploit with cd /usr/share/metasploit-framework/tools/exploit...