Book Image

Antivirus Bypass Techniques

By : Nir Yehoshua, Uriel Kosayev
Book Image

Antivirus Bypass Techniques

By: Nir Yehoshua, Uriel Kosayev

Overview of this book

Antivirus software is built to detect, prevent, and remove malware from systems, but this does not guarantee the security of your antivirus solution as certain changes can trick the antivirus and pose a risk for users. This book will help you to gain a basic understanding of antivirus software and take you through a series of antivirus bypass techniques that will enable you to bypass antivirus solutions. The book starts by introducing you to the cybersecurity landscape, focusing on cyber threats, malware, and more. You will learn how to collect leads to research antivirus and explore the two common bypass approaches used by the authors. Once you’ve covered the essentials of antivirus research and bypassing, you'll get hands-on with bypassing antivirus software using obfuscation, encryption, packing, PowerShell, and more. Toward the end, the book covers security improvement recommendations, useful for both antivirus vendors as well as for developers to help strengthen the security and malware detection capabilities of antivirus software. By the end of this security book, you'll have a better understanding of antivirus software and be able to confidently bypass antivirus software.
Table of Contents (13 chapters)
1
Section 1: Know the Antivirus – the Basics Behind Your Security Solution
5
Section 2: Bypass the Antivirus – Practical Techniques to Evade Antivirus Software
9
Section 3: Using Bypass Techniques in the Real World

Chapter 6: Other Antivirus Bypass Techniques

In this chapter, we will go into deeper layers of understanding antivirus bypass techniques. We will first introduce you to Assembly x86 code so you can better understand the inner mechanisms of operating systems, compiled binaries, and software, then we will introduce you to the concept, usage, and practice of reverse engineering. Afterward, we will go through implementing antivirus bypass using binary patching, and then the use of junk code to circumvent and harden the analysis conducted by security researchers and antivirus software itself. Also, we will learn how to bypass antivirus software using PowerShell code, and the concept behind the use of a single malicious functionality.

In this chapter, we will explore the following topics:

  • Antivirus bypass using binary patching
  • Antivirus bypass using junk code
  • Antivirus bypass using PowerShell
  • Antivirus bypass using a single malicious functionality
  • The power of...