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Antivirus Bypass Techniques

You're reading from Antivirus Bypass Techniques Learn practical techniques and tactics to combat, bypass, and evade antivirus software

Product type Paperback

Published in Jul 2021

Publisher Packt

ISBN-13 9781801079747

Length 242 pages

Edition 1st Edition

Concepts

Malware Analysis

Authors (2):

Uriel Kosayev

Nir Yehoshua

View More author details

Table of Contents (13) Chapters

Preface

1. Section 1: Know the Antivirus – the Basics Behind Your Security Solution

2. Chapter 1: Introduction to the Security Landscape FREE CHAPTER

3. Chapter 2: Before Research Begins

4. Chapter 3: Antivirus Research Approaches

5. Section 2: Bypass the Antivirus – Practical Techniques to Evade Antivirus Software

6. Chapter 4: Bypassing the Dynamic Engine

7. Chapter 5: Bypassing the Static Engine

8. Chapter 6: Other Antivirus Bypass Techniques

9. Section 3: Using Bypass Techniques in the Real World

10. Chapter 7: Antivirus Bypass Techniques in Red Team Operations

11. Chapter 8: Best Practices and Recommendations

12. Other Books You May Enjoy

Antivirus bypass using obfuscation

Obfuscation is a simple technique of changing a form of code—such as source code and byte code—to make it less readable. For example, an Android Package Kit (APK) file can easily be decompiled to make it readable to Java code.

Here is an example of a decompilation process:

Figure 5.1 – Basic decompilation process

An app developer does not want unauthorized individuals to see their code, so the developer will use an obfuscation technique to protect the code and make it unreadable.

There are several obfuscation techniques. These are the two main techniques we have used in our research:

Rename obfuscation
Control-flow obfuscation

Let's look at both of these techniques in detail.

Rename obfuscation

With this technique, obfuscation is mainly performed on the variable names within the code. This technique makes it difficult to read and understand the code, as well as to understand...

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Authors (2)

Nir Yehoshua

Nir Yehoshua

Nir Yehoshua is an Israeli security researcher with more than 8 years of experience in several information security fields. His specialties include vulnerability research, malware analysis, reverse engineering, penetration testing, and incident response. He is an alumnus of an elite security research and incident response team in the Israel Defense Forces. Today, Nir is a full-time bug bounty hunter and consults for Fortune 500 companies, aiding them in detecting and preventing cyber-attacks. Over the years, Nir has discovered security vulnerabilities in several companies, including FACEIT, Bitdefender, McAfee, Intel, Bosch, and eScan Antivirus, who have mentioned him in their Hall of Fame.

See other products by Nir Yehoshua

Uriel Kosayev

Uriel Kosayev

Uriel Kosayev is an Israeli security researcher with over eight years of experience in the cybersecurity field. Uriel is the author of the Antivirus Bypass Techniques book and a lecturer who has developed courses in the cybersecurity field. Uriel has hands-on experience in malware research, reverse engineering, penetration testing, digital forensics, and incident response. During his army service, Uriel worked to strengthen an elite incident response team in both practical and methodological ways.

See other products by Uriel Kosayev

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