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What are the most common computer viruses?

There are many different types of computer viruses, but some are more common than others. Here are some of the most common computer viruses:

1. The WannaCry ransomware virus was responsible for a global outbreak of cyberattacks in May 2017. The virus exploits a vulnerability in Microsoft Windows and encrypts users’ files, demanding a ransom be paid in order to decrypt them.

2. Another common ransomware virus is Cryptolocker, which was first seen in 2013. This virus encrypts users’ files and demands a ransom be paid to decrypt them. Cryptolocker has been known to spread via email attachments and infected websites.

3. The malware known as Conficker, which first appeared in 2008, is a worm that infects Microsoft Windows systems. Conficker spreads via removable drives and network shares, and is known for its ability to disable security features on infected computers.

4. The Zeus virus is a type of malware that is used to steal banking information. Zeus is typically spread via phishing emails that contain infected attachments or links to malicious websites.

5. The Sality virus is a type of malware that is used to infect computers and turn them into “zombies” that can be controlled by the person who created the virus. Sality is typically spread via infected removable drives or email attachments.

These are just a few of the most common computer viruses. There are many other types of malware out there, and new viruses are constantly being created. It’s important to have a good antivirus program installed on your computer and to stay vigilant about opening email attachments or clicking on links from unknown sources.

What are the top 10 computer viruses of all time?

1. Morris Worm

The Morris Worm is widely considered to be the first computer worm in history, and it’s certainly one of the most infamous. This self-replicating software caused massive damage when it was released in 1988, spawning numerous copycat worms in subsequent years. The Morris Worm was eventually eradicated, but not before it had done tens of millions of dollars in damage.

2. ILOVEYOU

This devious little virus took advantage of people’s trusting nature and willingness to openattachments from strangers. First appearing in 2000, the ILOVEYOU virus spread like wildfire, causing an estimated $5.5 billion in damage. The virus was particularly destructive because it not only replicated itself, but also overwrote critical system files, making recovery difficult or impossible.

3. Code Red

Named for its initial variant, Code Red was a worm that exploited a vulnerability in Microsoft’s IIS web server software. First appearing in 2001, Code Red quickly spread, infecting hundreds of thousands of systems. The worm was used to launch distributed denial of service (DDoS) attacks against various targets, including the White House.

4. Nimda

Just a day after the release of Code Red, another worm began making the rounds. Nimda was even more destructive than Code Red, spreading via multiple methods and causing an estimated $617 million in damage. Like Code Red, Nimda was used to launch DDoS attacks, bringing down prominent websites like Buy.com and eToys.

5. SQL Slammer

SQL Slammer was a worm that exploited a vulnerability in Microsoft’s SQL Server software. First appearing in early 2003, the worm quickly spread across the internet, causing widespread disruption. The worm caused such havoc that it was even responsible for knocking South Korea’s entire internet offline for a brief period of time.

6. Mydoom

Mydoom is notable for being the fastest-spreading email worm in history. First appearing in early 2004, the worm managed to infect an estimated 1% of all computers connected to the internet within just 24 hours. The Mydoom worm was used to launch DDoS attacks against a number of targets, including Google and the SCO Group.

7. Sasser

Sasser was a worm that exploited a vulnerability in the Windows Local Security Authority Subsystem Service (LSASS). First appearing in early 2004, Sasser quickly spread, infecting thousands of systems. The worm caused widespread disruption, particularly in Europe where it caused significant delays in air travel.

8. Conficker

Conficker is a particularly insidious worm that first appeared in late 2008. The worm is notable for its ability to spread rapidly and for its use of advanced evasion techniques. Despite initially being considered a low-risk threat, Conficker has since been upgraded to a critical threat by many security experts.

9. Stuxnet

Stuxnet is a malicious piece of software that was specifically designed to target industrial control systems. First appearing in 2010, the worm is believed to have been responsible for damaging nuclear centrifuges in Iran. Stuxnet is notable for its sophisticated design and for being the first piece of malware to specifically target industrial systems.

10. WannaCry

WannaCry is a ransomware worm that first appeared in May of 2017. The worm quickly spread across the globe, infecting hundreds of thousands of systems. The WannaCry worm was particularly damaging because it exploited a critical vulnerability in Microsoft Windows. The worm caused an estimated $4 billion in damage and was responsible for bringing down many hospitals and businesses.

What is the most common type of computer virus?

There are many types of computer viruses, but the most common type is the Trojans. This virus is so named because it is disguised as a legitimate program or file, but once it is installed, it can wreak havoc on your system. The Trojan will either delete important files, or it will encrypt them so that you can’t access them. It can also give hackers remote access to your system, which means they can control it and use it to steal your personal information or viruses.

What are computer viruses and what do they do?

Computer viruses are malicious software programs that are designed to cause damage to computers or electronic devices. Viruses can spread to other devices on the same network, or be transmitted via email attachments or infected websites. They can cause a range of symptoms, from slowing down your device to deleting files or even taking control of your device. In some cases, viruses can be used to steal personal information.

There are many different types of computer viruses, and new ones are constantly being created. Some of the most common types include:

Trojan horses: Trojan horses are malicious programs that masquerade as legitimate software. They are often used to steal personal information or to give attackers access to your device.

Worms: Worms are similar to Trojan horses, but they can replicate themselves and spread to other devices on the same network.

Adware: Adware is a type of virus that displays advertising on your device, often in a popup window. It can be difficult to remove, and in some cases it can be used to collect personal information.

Spyware: Spyware is a type of virus that can collect personal information, such as passwords and credit card numbers, and send it to third parties.

Ransomware: Ransomware is a type of virus that can encrypt your files and demand a ransom for the decryption key.

Computer viruses can have a number of different effects on your device. They can cause your device to slow down or crash, and can delete or corrupt files. In some cases, they can even take control of your device.

You can protect your device from computer viruses by using security software, such as antivirus and antispyware programs. You should also be careful about what you download and click on, as viruses can be spread through email attachments and infected websites.

How do computer viruses spread?

Computer viruses are able to spread in a number of ways. One common way is via email attachments. If a user receives an email with an attachment that contains a virus, and they open that attachment, their computer can become infected. Another way viruses can spread is by downloading files from the internet. If a user downloads a file that is infected with a virus, their computer can become infected. Additionally, viruses can spread by being included in programs that are downloaded from the internet. If a user downloads a program that contains a virus, their computer can become infected. Finally, viruses can spread by being transferred from one computer to another via USB drives or other removable media. If a USB drive or other removable media that contains a virus is plugged into a computer, the computer can become infected.

Visit malwarezero.org to learn more about computer viruses. Disclaimer: We used this website as a reference when writting this blog post.