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 5: Bypassing the Static Engine

In this chapter, we will go into bypassing antivirus static detection engines in practical terms. We will learn the use of various obfuscation techniques that can be used to potentially bypass static antivirus engines. Furthermore, we will go through understanding the use of different encryption techniques such as oligomorphic-, polymorphic-, and metamorphic-based code that can be used to potentially bypass static antivirus engines. We will also show how packing and obfuscation techniques are used in malicious code to bypass most static engines in antivirus software.

In this chapter, we will explore the following topics:

  • Antivirus bypass using obfuscation
  • Antivirus bypass using encryption
  • Antivirus bypass using packing