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Have you ever wished you could create your own virus for the purpose of learning or making fun of people? Creating a virus takes time and knowledge, but anyone can do it if they work hard. You will learn a lot about how programming languages work, and learn more about network and operating system security through virus creation. Take a look at step 1 below to get started on the fun virus creation process.
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Determine the operating system you will attack. The target is usually Microsoft Windows, especially older versions. Many Windows users are targeted because they don’t update the operating system with a newer version that fixes vulnerable security holes.
- Mac OS X and Linux are quite virus-resistant thanks to the way they are decentralized and the general structure of the operating system. 95% of viruses usually target Windows users.
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Decide how you want the virus to spread. The characteristic of the virus is to spread to many other users. You need to determine the method of spread before you start because this is one of the basic codes of the virus. Common transmission mechanisms include:
- Executable file (.EXE, .BAT, .COM, etc) – This program needs to be launched by the user and can often disguise itself as another file (such as an image).
- Macros (Microsoft Office) – Macros are programs that are embedded in a document or email. They attack Word, Outlook and other macro-enabled products. The most common method of spread is through email as an attached document.
- Web scripting – These malicious pieces of code are silently injected into the website without letting the web developer know. [1] X Research Source
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Identify the weak point you want to target. Viruses successfully exploit weaknesses in the security of a program or operating system to spread and execute a task. This requires a lot of research and understanding of how to proceed, but online communities can help you understand more.
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Decide what you want the virus to do. After entering the system, what do you want the virus to do? The effects you might consider include: doing nothing, showing notifications, deleting files, and more. Be careful as creating and spreading malicious viruses can constitute a crime in most countries.
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Select language. To create a virus, you need at least a basic understanding of a computer language or scripting tool. More complex viruses often require multiple programming languages. For viruses to really work, you need to be familiar with assembly language.
- If you want to make an executable virus, start with C or C++.
- If you want to create a macro virus, you need to learn about the macro language for the target program, such as Microsoft Office.
- Visual Basic can be used to create malicious programs for Windows users.
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Start writing viruses. This is a process, especially if you’re coding for the first time. Experiment as much as you can and research ways to duplicate the code based on the language you’re using. Community forums and blogs have lots of tutorials for different languages.
- Research on polymorphic code. This technique tweaks the virus’ code each time it multiplies and makes it difficult for the anti-virus program to track it down. Polymorphic code is quite advanced and is implemented in different ways in every programming language.
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Research ways to hide code. Besides polymorphic code there are many ways to hide viruses. Encryption is a very commonly used tool by virus developers. This technique requires a lot of practice and understanding, but will contribute significantly to increasing the life cycle of the virus.
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Check for viruses. Once the template is up and running, you need to test it out on as many different computers and setups as possible. Setting up virtual machines in various configurations will help you check for viruses easily.
- You need to make sure viruses are under control so you don’t accidentally spread them before you’re ready. Put the test computer on an isolated network and observe the effect as the virus spreads.
- You can tweak the code while observing the virus in action on the test computer. Immediately fix the problems encountered.
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Spread the virus. Once you are satisfied with the virus, you can proceed with the distribution. However, before doing so, you need to be mentally prepared to face any possible consequences if the virus spreads in the community. It is better to apply your recent experience to a new project that will be useful. [2] X Research Source
Warning
- Distributing malicious code to the community is illegal. This guide is for learning purposes only.
- Remember that the act of spreading the virus has the potential to get you arrested and jailed, and even in serious international cases the FBI will step in.
X
wikiHow is a “wiki” site, which means that many of the articles here are written by multiple authors. To create this article, 51 people, some of whom are anonymous, have edited and improved the article over time.
This article has been viewed 12,213 times.
Have you ever wished you could create your own virus for the purpose of learning or making fun of people? Creating a virus takes time and knowledge, but anyone can do it if they work hard. You will learn a lot about how programming languages work, and learn more about network and operating system security through virus creation. Take a look at step 1 below to get started on the fun virus creation process.
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