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

Unquoted Service Path

When a service is created within the Windows operating system whose executable path contains spaces and is not enclosed within quotation marks, the service will be susceptible to an Unquoted Service Path vulnerability.

To exploit this vulnerability, an executable file must be created in a particular location in the service's executable path, and instead of starting up the antivirus service, the service we created previously will load first and cause the antivirus to not load during operating system startup.

When this type of vulnerability is located on an endpoint, regardless of which antivirus software is in place, it can be exploited to achieve higher privileges with the added value of persistence on the system.

For antivirus bypass research, this vulnerability can be used for a different purpose, to force the antivirus software to not load itself or one of its components so it will potentially miss threats and in that way, the vulnerability can...