Book Image

Mastering Defensive Security

By : Cesar Bravo
Book Image

Mastering Defensive Security

By: Cesar Bravo

Overview of this book

Every organization has its own data and digital assets that need to be protected against an ever-growing threat landscape that compromises the availability, integrity, and confidentiality of crucial data. Therefore, it is important to train professionals in the latest defensive security skills and tools to secure them. Mastering Defensive Security provides you with in-depth knowledge of the latest cybersecurity threats along with the best tools and techniques needed to keep your infrastructure secure. The book begins by establishing a strong foundation of cybersecurity concepts and advances to explore the latest security technologies such as Wireshark, Damn Vulnerable Web App (DVWA), Burp Suite, OpenVAS, and Nmap, hardware threats such as a weaponized Raspberry Pi, and hardening techniques for Unix, Windows, web applications, and cloud infrastructures. As you make progress through the chapters, you'll get to grips with several advanced techniques such as malware analysis, security automation, computer forensics, and vulnerability assessment, which will help you to leverage pentesting for security. By the end of this book, you'll have become familiar with creating your own defensive security tools using IoT devices and developed advanced defensive security skills.
Table of Contents (23 chapters)
Section 1: Mastering Defensive Security Concepts
Section 2: Applying Defensive Security
Section 3: Deep Dive into Defensive Security

Applying forensics tools and methods

There will be cases where you will be required by management or the HR department to gather some data from a given computer as evidence because a procedure, policy, law, or regulation has been violated.

Therefore, you need to have a variety of tools at hand that allow you to do this task in the most integral way, first to preserve your neutrality, but also because you may be dealing with evidence that may end up in court. So, let's start by understanding the best practices about how to manage evidence.

Dealing with evidence

When dealing with digital evidence, data integrity is key to demonstrating that the evidence has not been altered in any way.

The best way to achieve this is by using hashes because even the most minimal change will make the hash change. However, if the hash remains the same, then you will be 100% certain that the file hasn't been altered.

As shown in the following screenshot, just making the first letter...