Common Malware Types

Malware can cause a lot of damage to your computer, including corrupting or deleting files, stealing your personal information, making your computer run slowly, making your computer crash, or disrupting your internet connection.

There are many different types of malware, but some of the most common ones are Viruses, Trojans, Spyware, and Adware.

Malware can infect your computer in a number of ways, including through email attachments, infected websites, and peer-to-peer file-sharing networks. Malware can also include ransomware, which is a type of malware that locks your computer or mobile device until you pay a ransom to the attacker.

Let’s have a closer look at each malware type.

Computer Viruses

A computer virus is a type of malware that, once installed on a computer, can replicate itself and spread to other computers. Viruses can cause a variety of problems on a computer, including:

Slowing down the computer

Making the computer crash

Making the computer display unwanted ads

Stealing the user’s personal information

Infecting other files on the computer

Making the computer unusable

Computer Trojans

A Trojan is a type of malware that disguises itself as a legitimate program in order to trick users into installing it on their computers. Once installed, Trojans can perform a variety of malicious activities, such as stealing passwords, spying on users, or even crashing the computer.

There are many different types of Trojans, and they can be difficult to detect because they often look like legitimate programs. Some common Trojans include:

  • Backdoor Trojans
  • Browser Hijackers Password Stealers
  • Remote Access Trojans

Fileless Malware

Fileless malware is a type of malware that does not require a file to be stored on the computer in order to execute. Fileless malware is often delivered through malicious email attachments or through exploits in software that allow the malware to execute without being stored on the computer. Fileless malware is a growing threat because it is often difficult to detect and can be very difficult to remove from the computer. It can be used to steal information, install ransomware, or conduct other types of malicious activities. Some common methods that are used to deliver fileless malware include:

  • Malicious email attachments
  • Exploits in software
  • Drive-by downloads
  • Malicious ads watering hole attacks


Spyware is a type of malware that is installed on a computer without the user’s knowledge or consent. It is designed to collect information about the user and send it to a third party. Spyware can also be used to track the user’s web browsing habits and to deliver targeted advertisements.


Adware is a type of software that displays advertising content while the software is running. Adware can be installed on a computer when the user downloads and installs software from an unknown source, or when the user clicks on a pop-up advertisement. It can also be installed on a computer as a result of a virus or other malware infection.

Malware Bots

Malware bots are a type of computer program that is designed to spread malware. They are often used to send spam emails, install ransomware, or launch DDoS attacks.

Why people write malicious scripts

There are many reasons why people build malware. Some of the most common reasons include:

  • to make money – this is the most common reason why people build malware. Malware can be used to steal money from people’s bank accounts or to ransomware people and demand payment to unlock their computers.
  • to cause chaos – some people build malware just to cause chaos and disruption. They may target large organizations or governments, or simply aim to cause as much damage as possible.
  • to gain information – malware can be used to steal information from people’s computers, including passwords, bank account details, and other personal information.

How to protect against malware

Malware is a broad term used to describe a variety of malicious software, including viruses, spyware, and ransomware. Malware can harm your computer or steal your data, and it can be difficult to detect and remove.

Fortunately, there are steps you can take to protect your enterprise against malware. Here are a few tips:

  1. Install antivirus software Antivirus software is essential for protecting your computer against malware. Make sure you install a reputable antivirus program and keep it up to date.
  2. Use a firewall A firewall can help protect your computer from malicious software by blocking unauthorized access. Make sure your firewall is turned on and configured correctly.
  3. Keep your software up to date Software updates often include security patches that can help protect your computer from malware. Make sure you install all software updates and keep your operating system up to date.
  4. Be careful what you click Be careful when clicking links and opening attachments in emails. Many malware infections occur when users click on malicious links or open infected files.
  5. Educate your employees Make sure your employees are aware of the dangers of malware and how to protect themselves. Educate them about phishing attacks, how to identify malicious websites, and how to spot fake emails.
  6. Use a malware removal tool If your computer is infected with malware, you can use a malware removal tool to help get rid of it. There are a number of free and paid malware removal tools available, so be sure to choose one that is right for your needs.
  7. Back up your data If your computer is infected with malware, your data may be at risk. It is a good idea to back up your data regularly so that you can restore it if it is lost or damaged.
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