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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

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Product type Paperback
Published in Jul 2021
Publisher Packt
ISBN-13 9781801079747
Length 242 pages
Edition 1st Edition
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Authors (2):
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Uriel Kosayev Uriel Kosayev
Author Profile Icon Uriel Kosayev
Uriel Kosayev
Nir Yehoshua Nir Yehoshua
Author Profile Icon Nir Yehoshua
Nir Yehoshua
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Toc

Table of Contents (13) Chapters Close

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

DLL hijacking

This vulnerability takes advantage of the insecure DLL loading mechanism in the Windows operating system.

When software wants to load a particular DLL, it uses the LoadLibraryW() Windows API call. It passes as a parameter to this function the name of the DLL it wishes to load.

We do not recommend using the LoadLibrary() function, due to the fact that it is possible to replace the original DLL with another one that has the same name, and in that way to cause the program to run our DLL instead of the originally intended DLL.

In non-antivirus software, this vulnerability can have a low/medium severity level, but in the context of antivirus software, this vulnerability could reach critical severity, since we could actually cause the antivirus to load and run a malicious DLL. In certain cases, it could even cause the DLL to disable the antivirus itself or even aid in bypassing white-list mechanisms.

Important note

In order to exploit a DLL hijacking vulnerability...

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