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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 encryption

Encrypting code is one of the most common ways to succeed with a bypass and one of the most efficient ways to hide the source code.

Using encryption, the malicious functionality of the malware will appear as a harmless piece of code and sometimes seem to be completely irrelevant, meaning the antivirus software will treat it as such and will allow the malware to successfully run on the system.

But before malware starts to execute its malicious functionality, it needs to decrypt its code within runtime memory. Only after the malware decrypts itself will the code be ready to begin its malicious actions.

The following diagram shows the difference between an EXE file with and without encryption:

Figure 5.10 – Malware before and after encryption took place

In order to use code encryption techniques correctly, there are a few basic sub-techniques to be familiar with that we used while writing this book. Here are these...

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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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