Different Types of Malware Explained ( Virus, Trozens, Spyware & Ransomware)

Here in this article we are going explain the types of Malware, but before that we have know about the true definition of Malware.

What is Malware:

Malware (malicious software) is nothing more than a type of software. When it enters the system or network it will take the form of executable code, scripts and other software, acting against the interest of the computer user. It specially designed to cause damage to a personal computer, high security server or computer network.

Functions performed by Malware:
Malware is a type of programs can perform a variety of functions which are given below.
⦁ Stealing
⦁ Encrypting
⦁ Deleting sensitive data
⦁ Altering or hijacking basic computing functions
⦁ Monitoring users sensitive computer activity without their permission.

Why Malware:

In this digital world there are two types of users of malware present in the world named as black hat hackers and governments. Now the big question arises that why they use this malware software? The simple and straight forward answer of this above big question is that both black hat hackers and government want’s to steal personal, financial, or business information to make their personal benefit.

Some of the key motives of Malware are given below.
⦁ Used for sending spam emails
⦁ Used to gain information such as personal identification numbers or details, bank or credit card numbers, and passwords.
⦁ Used to generate money by click fraud
⦁ Cyber attack for extortion
⦁ Used for political motives to steal nuclear information of other country

Types Of Malware:

Malware further divided in to other types of Malware according to their purpose and way of behaving. Some most used type of malware in this digital world are given below.
⦁ Virus
⦁ Trojans
⦁ Spyware
⦁ Ransomware

Let us take a detailed look of the above types of Malware.


It is the widely used type of the malware in the world. The way of acting Computer virus is same like biological virus in human being. Means biological virus spread from one person to another, computer virus also spread from one Computer re network to another. But the major difference between these two are that computer virus need a catalyst to spread like in host or network.
A computer virus is a malicious code which is capable of copying itself and spreading one computer to another computers or one network to another network. The main function of the Computer virus is to delete your files, steal your data, and  spread to other system on your network.
Here are seven types of computer virus which are divided according to their behavior and uses.

Boot Sector Virus: The boot sector virus is a type of  computer virus that infects the boot sector of floppy disks or the Master Boot Record (MBR) of hard disks. They are the most dangerous types of virus because it very much difficult to remove and finally it can be removed by a full system format.
Now a days chances of infected this type Boot sector virus is very low because companies has done a improvements in BIOS architecture.

Direct Action Virus: It is also called Non resident virus.  It doesn’t install itself although they attaching itself to a special type of file (typically EXE or COM files). When someone executes the file with these extension, it gives their results and looking for other similar files with same in the directory for spreading in to the system.
It can be easily removed by a good Anti-virus program.

Resident Virus: A resident virus is a kind of malware that hides and stores itself within the computer memory. There are two major categories of resident viruses: fast infectors and slow infectors.
Fast Infectors spread very vastly among host as well as files where as slow infectors spreads very slow only among files. You can easily remove resident virus by installing a good anti-virus software. You can also manually remove this virus.

Multipartite Virus: Multipartite virus is a malware that attack both the boot sector and the executable, or program, files at the same time. It is also called A hybrid virus and multi-part virus as well.

Polymorphic Virus: This type of viruses are usually infected via spam, infected sites, or the result of other malware. URSNIF, VIRLOCK, VOBFUS, and BAGLE or UPolyX are some of the most dangerous polymorphic viruses in the current world. The main function of the Polymorphic virus is to affects data types and functions.

Overwrite Virus: An overwriting virus is a malware which, after infection, will effectively destroy the original program code, typically by overwriting data in the computer system’s memory.

Spacefiller Virus: Spacefiller virus is a type of malware tried to install itself inside of the file it is infecting.


It is a type of malware that is often mask as authorized software. Trojans is a best tool for a cyber-thieves and hackers which are trying to gain access to users remote systems.
Trozens can be infected in your system by clicking on some fake advertisement on social media or anywhere else.  Trojans always wants to access user’s personal information such as banking information, passwords etc.
Unlike network viruses, Trojan horses do not attempt to replicate themselves into other files. Once Trojan installed in your computer system, then this malicious software will infect other files placed in your system and potentially damage and destruction on your computer. It can also send important information from your computer over the Internet to the developer of the virus or owner of that Trojan.


Spyware is a type of malware or we can say that malicious software by which it gathers information about a person or organization and country without their any prior knowledge. It may or may not  send such useful  information to another party without the user knowledge.
Some of the basic task done by spyware are given below.
⦁ Tracking and storing Internet users’ movements on the Web
⦁ Installed by the owner of a shared, corporate, or public computer intentionally  to monitor users behavior.
⦁ Monitors a user’s computing

Collect any type of data, which are given below.
⦁ Internet surfing habits
⦁ User logins,
⦁ Bank account credentials
⦁ Credit account information.

If you want to know some of the key behavior of Spyware infected device. Then please have a look to given below points.
⦁ Unwanted CPU activity,
⦁ Disk usage
⦁ Increase in network traffic.
⦁ Applications freezing
⦁ Failure to boot, and
⦁ System-wide crashes.
⦁ Difficulty in connecting to the Internet.


Ransomware is a type of malware designed in such a way that it block access to a computer system or computer files until a amount of money is paid.
Some of the basic steps which is perform by Ransomware are given below.
STEP 1: Firstly,  ransomware code encrypt the files on the infected computer
STEP 2: Making all encrypted files inaccessible.
STEP 3: Finally, demand a ransom payment to restore access to those encrypted inaccessible files.

Till now there no 100% working solution that can reduce the chance of getting infected from ransomware. Still there is a best way to reduce the chance of Ransomware attack to your system, is that to take your data backup regularly and consistently.
Now a days  some organizations can also uses an anti-ransomware technology in order to prevent the execution of ransomware. If you would like to take our recommendation regarding anti-ransomware technology is RansomFree, a free tool to protect PCs and servers network from unknown ransomware attacks.

Leave a Comment