Sat. Dec 2nd, 2023
What is a Computer worm?

A computer worm is an infection that spreads itself across networks without any human intervention. Unlike viruses, which must attach themselves to an existing host file or program, worms operate, replicate, and spread independently.

Once infected on one machine, they can use various methods, such as exploiting vulnerabilities in operating systems or applications or sending copies via email or instant messaging to infect other computers on the network.In this blog we gonna see computer worm vs virus, what is a worm and how to prevent computer worms.

Worm Vs. Virus Comparison


A computer virus is a program that infects other programs or files on a computer by altering them or adding their code. When someone opens or executes an infected file or program, the virus’s activation can spread to other computers through email attachments, file-sharing networks, or other methods. Viruses often aim for replication and spread as much as possible, damaging files by deleting data, stealing identity details, or taking up system resources.


A computer worm is an automated program that spreads throughout a network without needing permission from its host to open or execute files. They typically exploit computer security flaws to spread automatically and infect many machines quickly. Worms do not attach themselves to host files or programs and can spread independently. Worms also cause damage by overloading networks, installing backdoors, or stealing data.

How Does the Worm Affect Your Computer?

The worm impacts your computer in several ways.

Exploiting Vulnerabilities: The worm searches for vulnerabilities or weaknesses in computer systems, such as unpatched software or weak passwords, and uses them to gain access. The worm often follows a pattern; four main ones include reproducing, propagating, and concealing Executing Payload.

Replicating: Once the worm has gained access to a computer system, it creates multiple copies of itself and attempts to spread to other vulnerable systems on the same network or the Internet.

Propagating: The worm uses various techniques to spread itself, such as scanning for open ports, sending copies via email, and exploiting software vulnerabilities to infect other computers on the network automatically.

Concealing: To avoid detection, a worm may employ techniques such as encrypting its payload, disguising itself as a legitimate file, or altering its code to bypass antivirus software.

Executing Payload: Once the worm has infected a system, it can carry out various malicious tasks like stealing data, erasing files, or using that computer to launch further attacks against other computers.

Some Famous Computer Worms

Morris Worm: Created in 1988 by Robert Morris, the Morris Worm is considered the first significant computer worm. It exploited vulnerabilities in Unix-based systems, slowing down or crashing affected machines and causing an estimated $10-100 million worth of damages.

ILOVEYOU: In 2000, the ILOVEYOU worm spread through email attachments and caused widespread destruction – infecting millions of computers worldwide at an estimated cost of $5.5 billion in damages.

Code Red: In 2001, the Code Red worm exploited vulnerabilities in Microsoft IIS web servers, enabling infected machines to launch a distributed denial-of-service (DDoS) attack against the White House website that caused an estimated $2 billion in damages.

Conficker: First discovered in 2008, the Conficker worm exploited a vulnerability in Microsoft Windows to infect millions of computers worldwide. It could launch an extensive DDoS attack or steal sensitive information from affected systems.

WannaCry: Also known as WannaCry, this worm spreads via email attachments.

Computer Worm Damages

Computer worms can lead to high financial costs for individuals, businesses, and governments. The costs associated with a computer worm include:

Lost Productivity: Worms can slow down or crash computer systems, leading to lost productivity for individuals and organizations alike. This could result in lost revenue or missed deadlines.

Data Loss: Worms can delete or corrupt data stored on infected systems, losing sensitive information like financial records or customer details. Recovering this data may take considerable time and effort – not to mention being costly!

IT Support Costs: Recovering from a worm attack can require substantial IT resources, including hiring specialists to diagnose and fix infected systems.

System Restoration: After a worm attack, infected systems may need to be completely erased and restored – an expensive process that takes time. Furthermore, data loss could occur if backups aren’t kept up-to-date.

Reputation Damage: A worm attack can tarnish an organization’s reputation, particularly if customer data is compromised. This could lead to the loss of trust and future business opportunities.

How to eliminate computer worms?

Removing a computer worm can be an intricate process that may require the assistance of a certified cybersecurity expert. Here are some general steps you should take to eliminate your computer worm successfully:

Disconnect from the Internet: The initial step should be to disconnect the affected computer from the Internet to prevent the worm from spreading to other systems or communicating with a remote attacker.

Identify the Worm: Run a malware scan using up-to-date antivirus software to identify which specific worm has infected your system.

Check out my Medium blog

Disable System Restore: Some worms can hide in system restore files, so it’s essential to disable this function before attempting to eliminate the worm.

Remove the Worm: Most antivirus programs should be able to detect and eliminate the worm from your system. However, an advanced malware removal tool may be required if it proves particularly challenging.

Repair any Damage Caused: Once the worm has been eliminated, any harm it caused to your system or files must be rectified. This may involve restoring system files or reinstalling software.

Update Software: To prevent further infections, it’s essential to update all software on the system to the most up-to-date version – this includes operating systems, antivirus programs, and other applications.

Reconnect to the Internet: Once your system has been thoroughly cleaned and secured, it can be reconnected.


Computer worms are malicious software programs that can harm computer systems, networks, and individuals. They infect systems, spread to other machines, steal data, delete files, and otherwise cause extensive destruction. Preventing worm infections necessitates the implementation of strong cybersecurity practices, such as updating software regularly, using strong passwords, and exercising caution when opening emails or attachments.

(How AI used in interior design?)

Once a computer worm is identified, it’s essential to take immediate action to isolate the affected system, eliminate it and repair any damages it has caused. By taking preventative measures and responding quickly when infections occur, individuals and organizations can safeguard themselves from computer viruses’ costly and devastating effects.

By Hari Haran

I'm Aspiring data scientist who want to know about more AI. I'm very keen in learning many sources in AI.

Related Post

Leave a Reply

Your email address will not be published. Required fields are marked *