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They also give a list of possible things such вЂa set of instructionsвЂ™ could do: defines malware as a set of instructions that run on your computer and make your system do something that an attacker wants it to do. We also take a look at the detection rates by some virus scanners. Finally, in chapter 6, we demonstrate an infection of the virus, and its propagation to other files, on an actual system. We go through our C++ code, and explain its different aspects. Then, in chapter 5, we show our implementation of a virus. the injection of our parasitic virus into a host executable, will work, and what issues need to be resolved before we can do this.

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Chapter 4 explains how the actual code injection, i.e. We need an extensive knowledge of this format to be able to infect these types of files.

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In chapter 3, we examine the Microsoft Portable Executable (PE) file format, the format used to store executable files in Microsoft Windows. In the next two chapters, we take a more practical look at code injection.

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Chapter 2 delves into the techniques commonly used by anti-virus software to detect these threats. We also show that within the class of viruses, even more subdivisions can be made. Because many people seem to think that every malware program is a virus, we give an overview of all different kinds of malware in chapter 1. The first two chapters cover the theoretical part of our work. We will show that it is also possible to write one in C/C++. Most parasitic viruses are written in assembly because of their low level nature of operation. Introduction In this paper, we will investigate what computer viruses are and how they function, and show how a parasitic virus could be written in the C/C++ programming language. Д¬ode injection 4.1 Location of injection. 3.1.1 Relative Virtual Address (RVA) 3.1.2 Virtual Address (VA). Д¬ONTENTS Portable Executable file format 3.1 Address formats. 2.2.4 Behavior blocking 2.2.5 Inoculation. 1.2.8 Document virus / Macro virus 1.3 Worms. We then implement a virus using this technique in C/C++, explain how it works and provide a demonstration on a real system. Next, we explain how code injection works by taking a look at the Microsoft Portable Executable (PE) file format (which is used to store executable files in Microsoft Windows), and we investigate how code can be injected in such a file. We start by giving an overview of different types malware (focusing on viruses), and discuss techniques used by anti-virus software. Martin Timmerman.ДЄbstract In this paper we will investigate what computer viruses are and how they function, and show how a parasitic virus could be written in the C/C++ programming language, using only a minimum of inline assembly code. Faculty of Applied Sciences and Engineering Department of Electronics and Informatics (ETRO)Д¬ode Injection and Computer Viruses Paper for the course of Operating Systems and Security by prof.