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

Finding evidence

As soon as you discover an attack, there are a lot of things that need to be done with the utmost priority, including restoring the systems and services that have been impacted. However, another critical task is to find and secure all the evidence related to the attack. This task is critical as it allows you to do the following:

  • Determine whether the attack was executed by an insider or outsider.
  • Determine whether the insider was a malicious insider or an inadvertent user.
  • Determine the vulnerability exploited by the attacker.
  • Determine the impact on business data in terms of the confidentiality, integrity, and availability (CIA) triad.
  • Determine the systems or services impacted by the attack.
  • Collect evidence to execute legal or corrective actions (from HR).

Now that you know about the importance of collecting evidence, let's look at some best practices regarding the collection process itself.

Sources of data

As you may...