Types of computer viruses is a program or application that can reproduce, and spread by itself, and cause negative effects on infected computers. Usually the virus enters the computer by inserting itself in a file or program.
The effects of computer viruses also vary, ranging from the loss of files from the computer, unusual errors occur (eg freeze), the program cannot be use, to files being stolen.
Viruses can also make it possible to damage hardware on a computer.
Computers that are infected with many viruses usually can’t be cleaned with antivirus anymore, and one way is to clean / format the hard disk in the computer.
So since when did the virus exist? Viruses have been around since the first computer appeared. The first time a virus was created was Program War or Core War.
it was created with the aim of attacking, repairing and destroying programs. In essence, viruses are created for things that have a detrimental impact.
As the virus evolves, the viral defenses also develop to prevent further spread and unwanted damage. In 1989, a polymorphic virus was discover.
A types of computer viruses that itself can transform itself into a new variant known as V2Px. Around 1990, the DIR II virus was also found to have the ability to infect programs by attacking FAT data.
11 Types of Computer Viruses + Types of Dangerous Virusses
Viruses are very dangerous if not handled properly and wisely. If you know, that there is a series of information about the most dangerous virus that has ever existed in the world. If you want to know, read more below.
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1. Worm
Worm is a types computer viruses that is not too dangerous. But if allowed to continue. Then this virus can make computer storage full quickly and make the computer system becomes fragile.
This virus can reproduce quickly and can create useless random files on the computer. This is what causes the memory and hard drive to be full of this virus.
This worm virus can infect computers that use email and are connected to the internet network. This is the same as what Trojan viruses do.
2. Trojan
This type of computer virus is created with the ability to control, control data or even steal data on the computer. Similar to the Worm virus.
This Trojan virus usually appears through the internet and also emails received by users and personal data that is not password.
The purpose of the Trojan is to obtain information from the target such as passwords, user habits recorded in the system log, data, and control the target.
3. Backdoor
Backdoor is a type of computer virus that is almost the same as a trojan. However, a Backdoor usually resembles a fine file such as a game.
Backdoor refers to a mechanism that can be use to access a system, application, or network, apart from commonly used mechanisms such as through the logon process or other authentication processes.
While the most dangerous types of viruses are describe below
Types of Dangerous Viruses
In addition to the computer types of viruses above, there are also other types that are very dangerous for your device. Many of them can cause fatal damage to hardware or software.
And worse, your important data can be lost in a fast time. As with ransomware , it may not be some kind of virus . But ransomware can keep your OS locked forever even with your important data.
Worse yet, you will be asked for a ransom to be able to access your data again. If you are exposed to ransomware, you should quickly read the step by step how to handle it below.
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4. Spyware
Spyware viruses are software that is install secretly by hackers and used to monitor victims’ online behavior. This viruses is classified as a type of malware designed to access and damage your computer.
However, because advertising software is less dangerous because it doesn’t steal data, Spyware does it and sends the collected results to their creators.
It can cause losses such as data theft, additional internet costs and make the internet connection slower.
5. Rogue
Rogue is a program that mimics an antivirus program and performs activities like a normal antivirus, by giving false warnings about viruses.
The goal is for users to buy and activate the fake antivirus program and bring in money for the creators of the rogue virus. Also rogue can open security holes in the computer to bring other types of viruses.
6. Rootkit
A rootkit is a hidden type of malware that is design to hide the presence of certain processes or programs on your computer from the usual detection methods.
Thereby allowing or other malicious processes access to your computer. These rootkits often change parts of the operating system and also install themselves as drive or core module.
7. Types of viruses that are often encounter
Web scripting is a program code that is use to operated the content contain in a website.
However, this virus often appears when a computer is connect to the internet and interferes with programs on the computer. So this is what makes Web Scripting classified as a virus.
8. Multipartite Virus
This virus hides in RAM which of course can infect the operating system on certain programs. If not immediately addressed, then this virus will penetrate the hard disk.
This multipartite virus has the ability to attack your computer very quickly. This is consider to be very dangerous for the health of RAM and computer hard drives.
The effect if your computer has a Multipartite virus is that it will automatically format the hard drive so that some applications cannot be open.
9. Memory Resident Virus
As the name suggests, Memory Resident Virus is one of the viruses create to infect RAM memory. The effect of this viruses types is that it will make computer performance very slow and infect computer programs.
This type of virus will automatically activate when the computer is turned on. The existence of this virus will make the program performance on the computer work abnormally.
To overcome this Memory Resident Virus, you only need to use an antivirus such as Avast, Smadav, Avira or similar antivirus.
10. FAT Virus
FAT Virus or File Allocation Table is a virus that can damage certain files. This virus usually hides in private data storage. The ability of this virus is to be able to hide important files as if the file was lost or deleted.
11. Directory Virus
This virus is a type of virus that can infect files with .exe extension. Files that have this extension will be lost or error for no reason while being or will be operated.
When the working system on this .exe-formatted file works, this Directory Virus will also be active and can infect other files. If this virus has started to spread.
As a result, the computer will slow down and many programs will run out.
Effects can be Caused by Viruses
Many side effects can be cause by viruses, these side effects can affect programs and computer systems. Some of the common complaints caused by computer virus infections include:
- Hard disk memory that suddenly becomes very full
- Corrupt files or programs
- Files suddenly lost or hidden
- The system is easy to restart and shuts down by itself
- Some new files or programs appear on the computer without being install
How to Avoid Virusses Attack?
Although viruses can cause many negative things, we can still prevent and overcome viruses that have or will infect our computers. Here are some steps you can take:
1. Install computer updates and anti-virus
You have to make sure that your computer is always update every time there is a new update. Because usually updates are improvements and additions to the previous version.
2. Be careful when downloading or using public Wi-Fi
Free Wi-Fi is not always a good thing. Because if you are in a public area, free Wi-Fi can be a trap prepare by hackers to steal data and information or insert viruses on your computer. Connect your device to a truly trusted Wi-Fi.
3. Anti-virus scanning of portable devices
Always be careful of portable devices that will be connect to your computer (for example usb or flash) you should always scan for portable devices because portable devices often carry viruses from other computers.
4. Backup data regularly
This is a backup plan in case your computer has been infected by a computer virus. Make it a habit to back up important data. Because if the data has actually been infected by a virus or is lost.
Then you still have the main data in a different location or device and you can access the data safely.
Conlcusion
Always be alert every time you use your device. This is to reduce the impact of any damage caused by the virus. When technology is developing very rapidly, the negative impacts that arise are also very many.
An example is this viral article. For example, always be careful if you are surfing the internet, especially to download an application that is not clear on the security of the application or is called a crack.
This allows you to be exposed to viruses that are harmful to your data.
1 comment
Your enticle helped me a lot, is there any more related content? Thanks!