If you’re a regular or even an occasional computer user, then you might’ve heard the terms like Viruses, Worms, Trojans, Bots, Malware, Spyware, etc. But honestly speaking, we consider all these to be a Virus, no matter, whatever be their type.
Have you ever tried to acknowledge, what is the difference between virus, trojan, worm, spyware, and malware? Although, they are meant to harm your device, steal your data, and spy on you. But have you ever thought why they are named so differently? Basically, terms like Viruses, Trojans are all types of malicious software, or simply, ‘Malware’.
Now, the first and foremost question arises, from where did virus come? Who created the first virus?
Clearly, they are not some out of the world aliens. In fact, the real truth is that they were not even created with an intention to harm someone.
The history of malware attacks goes back to 1949, when John von Neumann, first developed the theoretical base for self-duplicating automation programs, but the technical implementation was not feasible at that time. The term ‘Computer Virus’ was first used by Professor Leonard M. Adleman in 1981, while in conversation with Fred Cohen.
World’s first computer virus named ‘Brain’ was coded by two brothers Basit Farooq Alvi and Amjad Farooq Alvi, who were from Lahore, Pakistan. Brain was meant to infect storage media based on MS-DOS FAT file systems. It was originally designed to infect the IBM PC, it replaced the boot sector of its floppy disk with the virus. The virus program changed the disk label to ©Brain and the defected boot sectors displayed this message:
However, as you may presume, there was no evil intention behind this. Alvi brothers once justified Brain in their interview with TIME magazine; they created the virus only to protect their medical software from piracy. It was their countermeasure against copyright infringement acts.
Coming back to Malware, these are malicious software designed to harm a computer which may or may not be connected to a network. Malware only gets into action when there is a computer hardware involved in the game. Otherwise, the term Malware is of no use.
Worms are malware computer programs which have the ability to replicate themselves. Their sole objective is to increase their population and transfer themselves to another computer via the internet or through storage media. They operate like spies involved in a top-secret mission, hiding their movement from the user.
Worms don’t cause any harm to the computer; their replicating nature consumes hard drive space, thus, slowing down the machine. A couple of the infamous worms are SQL Blaster which slowed the internet for a small period and Code Red which took down almost 359,000 websites.
Viruses also have the ability to replicate themselves, but they do damage files on the computer they attack. Their main weakness lies in the fact that viruses can get into action only if they have the support of a host program. Otherwise, they’re just like a defeated warrior. They stick themselves to songs, videos, and executable files and travel all over the internet. W32.Sfc!mod, ABAP.Rivpas.A, Accept.3773 are some of the examples of virus programs.
The Virus Gang (Types of Computer Virus):
Feel free to Google any one of them if you like.
Also Read: Top 10 Best Free Antivirus Software Of 2017
Trojans are not like viruses or worms, and they are not meant to damage or delete files on your system. Their principal task is to provide to a backdoor gateway for malicious programs or malevolent users to enter your system and steal your valuable data without your knowledge and permission. JS.Debeski.Trojan is an example of Trojan.
Trojans derive their name from the ‘Trojan Horse’ tale in which the Greeks entered the city of Troy with the help of a wooden horse disguised as a gift. But the Trojan turned out to be a sweet poison, as depicted in the movie Troy.
The Trojan Gang (Types of Trojan):
Feel free to Google anyone of them if you like.
Adware are used to display advertisements on your computer’s desktop or inside individual programs. They generally come attached with free-to-use software. They are the primary source of revenue for the developers of those software programs.
Adware can’t be entirely described as Malware as they have no intention to harm your machine, they only track what advertisements you’re more interested in viewing and display the relevant ads on your computer screen. For some people, this can be alarming as it’s a breach of their privacy. Also, an attacker can stuff malicious code inside an adware program and use it to monitor users’ machine and even compromise it.
Spyware programs also come attached with freeware. They track your browsing habits and other personal details and send it to a remote user. They can also facilitate installation of unwanted software from the internet. Unlike Adware, they work as a standalone program and do their operations silently.
You get very irritated when you receive unwanted emails from unknown senders; these are called Spams or junk emails. And the process of flooding the internet with the same message is called Spamming, done for the purpose of commercial advertising. These junk emails may sometimes contain Viruses or Trojans that enter your system as soon as you open the mail.
Bots or robots are automated processes that are designed to interact over the internet without the need of human interaction. They can be used for good and bad intentions. An evil-minded person can create a malicious Bot that is capable of infecting the host on its own. After transmitting itself to the host device, a Bot creates a connection with central servers which act as the command centers for the all infected hosts attached to that network called Botnet.
A bot’s skills include stealing passwords, logging keystrokes, analyzing network traffic, relay spam, launching DoS (Denial of Service) attacks, and opening backdoors on infected hosts.
Bots can be seen as the advanced form of Worms. Their infection rate and the tactic is more effective than that of Worms. These malicious Bots are created after a lot of hard work done by their malignant creators.
Ransomware is a type of malware that can alter the normal operation of your machine. It encrypts the data and prevents you from using your computer partially or wholly. Ransomware programs also display warning messages asking for money to get your device back to normal working condition.
Now, you might have had a brief idea about what is a malware? What are the different types of malware? Other than that, you now know that all of the computer programs that harm your computer aren’t a virus. There is a difference between viruses, worms, trojans, ransomware, and another kind of malicious programs which are collectively known as malware.
After reading all this, you might be thinking why people create malware. Obviously, there are good and bad people on our earth. Here are some reasons which might compel a coder to write malware programs:
and the list goes on….
By taking these simple measures, you can effectively keep your machine free from Malware and other potential threats.