October 19, 2020

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Author: Matthew Turner

The Main Difference Between Virus and Worm

Malicious software, or “malware” is a type of program created specifically for deleting, modifying, copying, or changing file format of data, or disrupting the PC operating system or local/global networks. Malicious programs include viruses, worms, Trojans, and special utilities (for cracking passwords on your computer, copying files, deleting them, and so on.)

We’ve already spoken about types of malware and their cyber threats. You can read more in our up-to-date blog.

But what is the difference between a virus and a worm? We can say with confidence that they are aimed at destabilizing the general functioning of a computer or the whole network. The most common ways to transmit this “infection” are by email, a link, file-sharing networks, or OS drivers.

Let’s take a closer look at worm vs virus and find their main differences.

What is a computer virus?

A virus is a specially created code that is embedded in existing files, where it reproduces. As a rule, such actions are aimed at destroying or damaging your private data.

A virus breaks the operating system, blocks commands, disables access to information, causes the operating system to crash, damages user settings.

For instance, if a user writes data to a document in Word, then saves it, and closes the app. After that, you can realize that the system didn’t save it because couldn’t recognize the format. Next, the virus starts creating files with the same name that you assigned when saving. It takes up space in the computer’s memory, filling it with its own data.

Often sources are downloaded archived documents, games, and other executable files. 

What is a computer worm? 

A computer worm is a program that penetrates a PC, installs, and sends itself to local/global networks. Worms, like viruses, move from one PC to another. They cause software errors, reproduce themselves, and create conditions for hackers to disrupt a particular server or local network’s operation.

A worm can act synchronously with certain viruses, steal passwords, hack accounts of payment systems, and get unauthorized access to the internet. All your created folders that is stored on your hard drive are also under a huge danger.

What is the difference between virus and worm? 

As usual, a computer virus is created to corrupt the entire data or software. But a worm is developed to perform a certain dangerous action. Worms can open access for unauthorized use of information or load data into memory without your knowledge.

When a PC is infected with a virus, all actions slow down completely. Some programs do not open, files appear with strange letters and symbols in the name or with a different creation date which may display years in the next century, or a person cannot copy folders and documents to a flash drive.

Let’s compare virus vs worm on the main indicators:

Of course, we can’t deny the real difference between these types of malware. Each of them is a serious danger for stable computer work. But a worm is just a subclass of the malware with its own characteristics. It can work without any special actions from third-parties and doesn’t infect unnecessary files.

While the main aim of a virus is to destroy saved information and paralyze the entire work of the device.

What to do if you find a virus or worm on your PC? 

*Note: Before, you should download the necessary plugin for virus detection.

First, we need to check whether the malware has put itself in autorun. For this, you can use the app “Total Commander,” which is a file manager like Windows Explorer but with many more features.

At the top of the Total Commander screen, from the control panel icons located under the menu, find the “Autorun programs” icon. From the displayed list, we can find the command BrowserUpdateCheck, and delete the main threat. 

Second, suppose your antivirus is outdated while updating its database. In that case, it notifies you of a threat. You should immediately disable the connection and perform a deep scanning process on the disk after a full update of the antivirus protection database. A complete check process will take a long time if the hard drive is filled with documents and archived data.

Third, if the second option won’t work, you need to reinstall the operating system. If you can’t remove the virus from your computer, you can reinstall Windows, and you need to take everything you need to a flash drive. However, if the computer is completely infected, you will not be able to copy anything to the USB drive, so you will have to format the hard disk with all the available information (pay attention, that in this case, you’ll lose all your data.)

The idea of Protected Internet: how to ensure your online privacy?

How to avoid viruses and worms?

The most important rule is to install strong antivirus protection. Strong antivirus protection, of which the most popular are Kaspersky, ESET NOD32, and Dr. Web, will help you maintain total control over your personal computer.

Also, forget about accepting unfamiliar folders and files from the internet, especially in the form of archived documents. It is better to check for reviews and comments about this download folder before you download it.

But since hackers have no limit to their imagination and constantly produce new viruses and worms aimed at those who ignore protection, you need to remember the basic rules:

• Don’t open emails from unknown senders with strange themes and attached files with the .exe extension.
• Use secure tools for anonymous and private internet connection like Utopia P2P. 
• Refuse to download illegal content on dubious sites.
• Be careful with torrents.
• Check removable media that connects to your computer.

Use our Checklist of Necessity Security Measures on the Internet and stay safe!