Differences

Difference between viruses and worms

Main difference Between viruses and worms

The main difference between viruses and worms is that viruses are a computer problem that needs a human source to spread, whereas worms are computer problems that spread through a network without human help.

Viruses vs. worms viruses and worms

A virus is a computer program that attaches itself with a file and then transfers from one computer to another and corrupts the user’s data. On the other hand, a worm is a malicious program that can replicate and transfer from one computer to another over the network and corrupts user data. A virus transfers slowly from one computer to another. On the other hand, a worm transfers quickly.

A virus requires a host to spread from one computer to another. So it needs human action to complete its transfer or spread from one system to another. On the other hand, a worm does not need a host or human action to transfer; it can spread across a network. The virus causes a problem by corrupting files or deleting data from the user’s computer. On the other hand, the worm is a type of problem that consumes system resources and slows down its activity. You can completely shut down the system.

There is an antivirus software present to save a system from viruses. On the other hand, a worm can be avoided by using antivirus or firewall software, etc. It is transferred through open ports. So make sure all useless open ports are closed. Therefore, a virus can be removed from a system by using antivirus software or by formatting. On the other hand, a worm can be removed using any virus removal software and formatting.

A virus can also collect system information to send to the hacker. On the other hand, a worm can send the collected information to the hacker, as well as to other infected computers.

Comparative chart

Virus Worms
A computer program that attaches itself to a file and then transfers from one computer to another and corrupts the user’s data is known as a virus. Malicious programs that can replicate and transfer from one computer to another over the network and corrupt user data are known as worms.
Transfer speed
It transfers from one computer to another slowly. Worms transfer at high speed.
Host requirement

viruses and worms

It requires a host to spread from one computer to another. A worm does not need a host.
Human action
You need human action to complete your transfer. It does not need human action to transfer.
Effects edit
It causes a problem by corrupting the files or erasing the data from the user’s computer. It uses system resources, slows down your activity and can completely shut down the system.
System protection
Antivirus software can be used to save a system from viruses. It can be avoided by using antivirus software or firewalls, etc. and closing useless ports.
Elimination of the problem
It can be removed from a system by using antivirus or by formatting. A worm can be removed using any virus removal software and by formatting.
Sending information
It can collect system information to send to the hacker. It can send information to the hacker and other infected computers.
Transfer source
It is transferred by attaching itself with a file or program. You can transfer via open system ports, email or network, etc.

What is a virus?

A virus is a computer program that is attached to a file and then transferred from one computer to another and corrupts the user’s data. This problem gets its name from human viruses that are transferred from one to another. It transfers from one computer to another slowly. It requires a host to propagate and cannot transfer itself. So it needs human action to complete its propagation from one system to another.

It is a type of virus that has malicious code and can be transmitted from one system to another. Normally, it is combined with a program or the boot zone of the hard disk. When this virus is related to a file or program, it is infected. So when these infected files or programs are active on the computer, it activates the virus and affects the system. The virus continues to replicate and transfer, attributing its replicas to other programs on the system.

A virus causes a problem by corrupting files or erasing data from the user’s computer. It can also collect system information to send to the hacker. Antivirus software can be used to save a system from viruses. It can also be removed from a system by using antivirus software or by formatting. The damage caused by the virus can also be recovered with the help of a good backup and recovery procedure plan.

Phases of the virus

  • Inactive phase: it is a phase of the inactive state of the virus. It can be activated through different means or events, for example, time, date or presence of any other program.
  • Propagation phase : the duplication phase of the virus, that is, it generates its copies during this phase.
  • Phase activation : activation phase of the virus to perform the required function.
  • Execution phase: it is the actual phase of virus activity, that is, the actual function of the virus that may or may not be harmful.

Virus types

  • viruses and worms
    10 types of computer viruses

    Parasitic virus: type of virus that attaches itself to executable files or programs and makes their copies.

  • Boot sector virus : type of virus that especially infects the master boot record of the disk. It begins to spread at boot time.
  • Stealth Virus – This type of virus displays built-in intellect that prevents its discovery by antivirus software.
  • Memory resident virus: it is the virus that attaches itself to a specific area of ​​the main memory. Here, it infects every executed file.
  • Polymorphic virus: it is a type of virus that keeps changing its identity with each execution. So, it is difficult to get this type of virus.
  • Metamorphic virus: it is like the polymorphic virus but with additional functionality. This type of virus keeps rewriting itself, in addition to changing its signature.

What are worms?

viruses and worms
Types of network topologies

A worm is a malicious program that can replicate and transfer from one computer to another over the network and corrupts user data. It is a kind of computer virus. You can transfer via open system ports, email or network, etc. You can also transfer with the help of the user’s email address book. So you don’t need a host or human action to transfer. On the other hand, it is a type of self-replicating virus.

A worm transfers at high speed. It is not attached to any program, but infects the computer’s exposure on the network. It keeps replicating and spreading before anyone can control it. But, before, it has infected a large area of ​​network and web servers.

A worm uses system resources, that is, its storage, etc., slows down its activity and can completely shut down the system. It can also send information to the hacker as well as other infected computers. It can be avoided by using antivirus software or firewalls, etc. and closing useless ports. A worm can be removed using any virus removal software and by formatting.

Example

A famous example of a worm attack takes place in 2017 when the wannaCry worm caused the loss of billions of dollars. It was also recognized as WannaCry ransomware and caused by a worm known as Cryptoworm.

Key differences

  1. A computer program that is attached to a file and then transferred from one computer to another and corrupts the user’s data is known as a virus, while a malicious program that can replicate and transfer from one computer to another over the network and corrupts user data. it is known as a worm.
  2. A virus transfers slowly from one computer to another. On the other hand, a worm transfers at high speed.
  3. A virus is transferred by attaching itself to a file or program. On the other hand, a worm can transfer through open ports of the system, email or network, etc.
  4. A virus requires a host to spread from one computer to another. In contrast, a worm does not need a host.
  5. A virus requires human action to complete its transfer. On the other hand, a worm does not need human action to transfer. He can transfer himself through a network or open ports.
  6. A virus causes a problem by corrupting files or erasing data from the user’s computer. On the other hand, a worm uses system resources, slows down its activity and can completely shut down the system.
  7. Antivirus software can be used to save a system from viruses, while a worm can be avoided by using antivirus software or firewalls, etc. and closing useless ports.
  8. A virus can be removed from a system by using antivirus or by formatting. On the other hand, a worm can be removed using any virus removal software and formatting.
  9. A virus can collect system information to send to the hacker. On the other hand, a worm can send information to the hacker, as well as to other infected computers.
Conclusion

The above discussion summarizes that a virus is a computer problem that is attached with a file or program and needs a human source to spread from computer to computer slowly. On the other hand, a virus is a computer problem that can be transferred over the network without human source and spread very fast.

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