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Antivirus Bypass Techniques

Antivirus Bypass Techniques

By : Nir Yehoshua, Uriel Kosayev
4.3 (23)
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Antivirus Bypass Techniques

Antivirus Bypass Techniques

4.3 (23)
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)
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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

Windows access control list

Each file in the operating system, including executables, DLL files, drivers, and other objects, has permissions based on the configured Access Control List (ACL).

The ACL in the Windows operating system is referred as the DACL and it includes two main parts:

  • The first part is the security principal that receives the relevant permissions.
  • The second part is the permissions that the object receives in addition to other inherited permissions.

Each of these objects is considered as a define acronym in the Access Control List. In the following screenshot, we can see an example of such an acl:

Figure 3.5 – File security properties (DACL)

In the preceding screenshot, we can see the entities or the security principal objects that will receive the relevant permissions.

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