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| what are a computer virus and types of virus? |
introduction
Are you interested to know what is a computer virus? Everyone knows how to use the computer and people who use the computer must have heard the name of the virus.The virus in English, this name is a very familiar name in the world of the Internet. Along with this, it is also a very scary name because it is very harmful to your computer and other electronic gadgets. That is, if it enters the system once, then it can also spoil it and can also destroy your data.
So today I am going to tell you in this article about what is a virus and how to kill the virus. Hopefully, you will get to know a lot by reading this article.
A computer virus is a small software program that is designed to delete your computer's operation and computer data or access it.
Computer viruses without our knowledge can spoil the system in such a way that it is not just for us to fix it. The computer runs from many software programs, without any program, the computer cannot work.
Software programs are made to make the computer work properly and some programs are also made to spoil the work of the computer.
The computer was invented by humans, humans made its program to run the computer, and as I said the virus is also a small program, it has also been made human. A computer virus is not natural, it is not made by itself, it is also made by the programmers consciously so that they can spoil other computers.
Or we can also say that viruses are actually computer programs that are destructive rather than productive. Its basic purpose is to bring damage to the place of providing help.
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This first virus was named the "Creeper" virus, and it was an experimental program that Thomas himself had done to infect the mainframes of ARPANET. After infecting the Virus system, it displayed on the following message screen, "Increased the creeper: Catch me if you can."
The original wild computer virus that was first tracked was "Elk Cloner." In the history of the entire computer virus, this Elk Cloner had previously infected Apple II operating systems through floppy disks. Richard Skrenta developed this virus in 1982, which was a teenager at the time.
Suppose computer viruses were designed according to prank, but it seems that if a malicious program is installed in the memory of the computer then it can do many such things by running the system to the user. You can stop further and they will not have any control over these malicious programs.
The first person to name these Malicious Programs as "Computer Virus" was Fred Cohen, who named them in 1983. This name came to the fore when he named these programs in an academic paper titled "Computer Viruses - Theory and Experiments" where he wrote full information about these malicious programs like how it works, what it Can do etc.
Virus slows down the speed of your computer. It destroys your files and program.
Malware is also the name of a virus that starts to slowly erase the data of your system.
Where does Malware come into our computer? Malware can come from many places in our system and the most used source which is a common source today is the internet.
On the Internet, we get some information every day. If we went to any malicious site to get the same information or downloaded pirated software, games, and movies from somewhere, then malware online comes into our computer from there.
This was about how online malware gets into our computer, now we will know how offline malware gets into our computer.
We all use Pendrive, CDs, DVDs on our computers. When we connect Pendrive and CDs from our place to get data from our computer, then malware comes into our computer from all these things and our computer destroys data.
Or it could be that this virus can completely corrupt your word processing software. In such a situation, if you copy or share a corrupted file, then this virus goes to another computer and also spoils its system.
Here computer infects occur when these malicious codes keep replicating themselves. Here I am going to provide information to you about the types of these computer viruses.
It is a very happy thing to recognize these viruses as they are spread through emails.
Spacefiller Virus - Also called "Cavity Viruses". They have been given this name because it fills all the spaces in the code, so it does not harm the files.
In the same way, when a particular program is also loaded, the virus also gets loaded automatically. These viruses come in the users' computers with email.
These macro viruses have been designed in such a way that it easily adds its malicious code to genuine macro sequences.
This does not make it vulnerable to which anti-malware. Whenever an anti-malware detects it, it modifies itself which makes it very smiling to get hold of it.
This happens when computer OSs load some applications or functions. Since it is hidden in the system's RAM, it is often not able to detect any antivirus or antimalware.
With this, the attacker can fundamentally modify or disable a program or function. These rootkit viruses can bypass antivirus software very easily. A rootkit scanner is required to capture them.
These boot viruses are not seen much these days because the present systems do not depend on much physical storage media.
If we copy and share the same files with another computer, then worms will go there and slow down that computer by making many copies of files.
For example, if you are using the internet and you have visited a site, there is an ad such as "click here to win smartphone" and if you click on it, then trojan horse malware comes into your computer only through it. Will go and you will not even know about it and your system will completely ruin it.
These are also present on the internet in the form of a lot of software, you will think that it is genuine software, but in reality, it remains a trojan that is hidden inside that software and once they come into your computer, then it will be in your computer. Start slowing down. With that, he would open a door so that different kinds of viruses and worms get into your computer.
History of computer viruses
Robert Thomas, he was the first engineer who first developed a computer virus while working at BBN Technologies in 1971.This first virus was named the "Creeper" virus, and it was an experimental program that Thomas himself had done to infect the mainframes of ARPANET. After infecting the Virus system, it displayed on the following message screen, "Increased the creeper: Catch me if you can."
The original wild computer virus that was first tracked was "Elk Cloner." In the history of the entire computer virus, this Elk Cloner had previously infected Apple II operating systems through floppy disks. Richard Skrenta developed this virus in 1982, which was a teenager at the time.
Suppose computer viruses were designed according to prank, but it seems that if a malicious program is installed in the memory of the computer then it can do many such things by running the system to the user. You can stop further and they will not have any control over these malicious programs.
The first person to name these Malicious Programs as "Computer Virus" was Fred Cohen, who named them in 1983. This name came to the fore when he named these programs in an academic paper titled "Computer Viruses - Theory and Experiments" where he wrote full information about these malicious programs like how it works, what it Can do etc.
What can computer viruses do?
Computer viruses can corrupt or delete the data on the computer. You can completely eliminate the data stored on your hard disk. Computer virus also spoils their computers by going to other computers through e-mail attachments.Virus slows down the speed of your computer. It destroys your files and program.
What is Malware - What is Malware
Malware's full name is malicious software. It is also a software program that gives access to computers. Malicious software means bad software that is not good at all and once it comes into your system, it can completely spoil your system.Malware is also the name of a virus that starts to slowly erase the data of your system.
Where does Malware come into our computer? Malware can come from many places in our system and the most used source which is a common source today is the internet.
On the Internet, we get some information every day. If we went to any malicious site to get the same information or downloaded pirated software, games, and movies from somewhere, then malware online comes into our computer from there.
This was about how online malware gets into our computer, now we will know how offline malware gets into our computer.
We all use Pendrive, CDs, DVDs on our computers. When we connect Pendrive and CDs from our place to get data from our computer, then malware comes into our computer from all these things and our computer destroys data.
Types of Malware
Malware is of three types - Virus, worm, and Trojan horse. These three are different, their work is also different. These three spoil your computer in different ways. Let us know about these three and what they do.What is a virus?
The virus can corrupt the files and software on your computer. Suppose there is a word document in your system in which the virus has come, then it will delete the data of your document or corrupt the document from which you will not get any information.Or it could be that this virus can completely corrupt your word processing software. In such a situation, if you copy or share a corrupted file, then this virus goes to another computer and also spoils its system.
Virus type
A computer virus is a type of malware that if entered into the computer's memory, then it can multiply itself automatically and can also change programs, applications.Here computer infects occur when these malicious codes keep replicating themselves. Here I am going to provide information to you about the types of these computer viruses.
Boot sector virus
This type of virus infects the master boot record and removing them is a challenging task, and often the system has to be formatted to remove them. These are mainly spread by removable media.Direct action virus
They are also called a non-resident virus, once it is installed, it remains hidden in the computer memory. It stays attached to the specific type of files that it infects. They do not infect user experience and system performance.Resident virus
Like direct action viruses, resident viruses are also installed on the computer. Apart from this, identifying them is also a smile.Multipartite virus
This type of virus can affect the system in multiple ways. These infect both the boot sector and executable files simultaneously.Polymorphic Virus
Identifying these types of viruses is a very funny thing for a traditional antivirus program, as these viruses change their signature pattern frequently whenever they replicate themselves.Overwrite virus
This type of virus deletes all the files that they infect. To remove these viruses from the system, the user has to delete all the infected files, causing data loss.It is a very happy thing to recognize these viruses as they are spread through emails.
Spacefiller Virus - Also called "Cavity Viruses". They have been given this name because it fills all the spaces in the code, so it does not harm the files.
File infectors Virus
Some file infector viruses attach to program files, such as .com or .exe files. Some file infector viruses also infect files with .sys, .ovl, .prg, and .mnu.In the same way, when a particular program is also loaded, the virus also gets loaded automatically. These viruses come in the users' computers with email.
Macro viruses
As suggested in the name, these macro viruses mainly target macro language commands only in some applications like Microsoft Word.These macro viruses have been designed in such a way that it easily adds its malicious code to genuine macro sequences.
Overwrite Viruses
This virus has been designed in such a way that it can overwrite itself and destroy any file or application data. It starts to overwrite its own code once it starts an attack.Polymorphic Viruses
This type of virus is used more often by cybercriminals. This is a type of malware type that can easily change or mutate its underlying code and without changing any basic functions or features.This does not make it vulnerable to which anti-malware. Whenever an anti-malware detects it, it modifies itself which makes it very smiling to get hold of it.
Resident viruses
This virus implants itself in the memory of the computer. Basically, there is no need for an original virus program for infection to infect any files or program. Even if we delete the original virus, a version of it is stored in memory, which itself activates itself.This happens when computer OSs load some applications or functions. Since it is hidden in the system's RAM, it is often not able to detect any antivirus or antimalware.
Rootkit Viruses
This rootkit virus is a type of malware type that secretly installs an illegal rootkit in the infected system. With this, it opens a door for the attackers which gives them full control over the system.With this, the attacker can fundamentally modify or disable a program or function. These rootkit viruses can bypass antivirus software very easily. A rootkit scanner is required to capture them.
System or Boot-record Infectors Viruses
These boot-record infectors infect executable code that is found in specific system areas of the disk. As the name suggests, they infect USB thumb drives and the DOS boot sector more.These boot viruses are not seen much these days because the present systems do not depend on much physical storage media.
What is Worms?
Worms are also like viruses, but they multiply themselves and try to spread themselves as much as possible. This means that if there are worms in your system, then they start making many copies of different files, due to which the system slows down.If we copy and share the same files with another computer, then worms will go there and slow down that computer by making many copies of files.
What is a Trojan Horse?
Trojan Horse is a very dangerous malware. This malware comes by hiding your identity on your computer.For example, if you are using the internet and you have visited a site, there is an ad such as "click here to win smartphone" and if you click on it, then trojan horse malware comes into your computer only through it. Will go and you will not even know about it and your system will completely ruin it.
These are also present on the internet in the form of a lot of software, you will think that it is genuine software, but in reality, it remains a trojan that is hidden inside that software and once they come into your computer, then it will be in your computer. Start slowing down. With that, he would open a door so that different kinds of viruses and worms get into your computer.
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Signs of Virus Infection in the System
How to know if your system is infected with a Virus or not. That is why I am going to tell you about some warning signs below, which is very important to know for all computer users -- Slower system performance
- Frequent pop-ups on the screen
- auto start programs
- Files automatically multiplying / duplicating
- New files and programs are automatically installed on the computer
- Files, folders, or programs are automatically deleted and corrupted
- Weird sound from hard drive
How to Protect Your System from Viruses and Worms
Here I am going to give you some such tips that will make it easier for you to avoid these viruses.what should be done
1. Always install a good antivirus in your system and keep updating it from time to time.2. If you do not know about his sender then you should not open it.
3. Do not download anything from Unauthorized Websites such as MP3, Movies, Software, etc.
4. Get all the downloaded things scanned properly. Because they are more likely to have a virus.
5. Use removable media such as a pen drive, only after scanning the disks.
6. If you visit any website, then you should take care of one thing that it is a popular and registered website, and do not click on any such link which will cause you trouble later.
should not
1. Never open any email attachment that you do not know about that sender.2. Do not try to open any unsolicited executable files, documents, spreadsheets, without scanning.
3. Do not download documents or executable software from untrusted websites.
4. Ads that give you greed, click here and win the lottery, then never click on such pairs. We get similar greed in our e-mails too, so you should never open that mail as there are more chances of malware in it.
I hope you guys today what is a computer virus and what types of virus? You may have liked this article written on.
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