Computer Virus And Internet Worms Explained
Below is a MRR and PLR article in category Computers Technology -> subcategory Other.
Understanding Computer Viruses and Internet Worms
Overview
Is your computer acting sluggish, refusing to open programs, or not letting you access files? Just like humans, computers can get "sick" from viruses. If your device is infected, it may need attention from a computer technician to remove the virus and restore functionality. If you're knowledgeable about computers, you might be able to tackle this yourself.
What is a Virus?
A computer virus is a malicious program designed to infiltrate your system without your knowledge or consent. Like a parasite, it attaches itself to files or boot sectors, replicating and spreading throughout your system. While some viruses are relatively harmless, others can cause significant damage or degrade performance. It's important not to overlook any virus on your system.
Types of Viruses
Viruses are categorized based on their infection methods:
1. Program Viruses: Target executable files (e.g., .com, .exe, .ovl, .drv, .sys, .bin).
2. Boot Viruses: Affect the boot record, master boot, FAT, and partition tables.
3. Multipartite Viruses: Infect both program files and boot sectors.
What is a Trojan Horse?
A Trojan Horse, or Trojan, is a deceptive program that appears harmless but secretly performs malicious actions. Typically hidden within files from external sources (e.g., downloads, emails), Trojans can be dangerous. For instance, a seemingly innocuous game might be silently wiping your hard drive or sending your contacts to unsavory websites.
Trojans can also create backdoors in systems. For example, a Trojan posing as a login program could capture credentials, allowing unauthorized access later.
Noteworthy Trojans
- Notroj: Masquerades as anti-Trojan software but wipes your hard disk when nearly full.
- PWSteal.Refest: A BHO (Browser Helper Object) that steals banking details during transactions.
- PWSteal.Likmet.A: Fakes an MSN Messenger window to capture passwords.
- Run.me: Disguised as a graphics program, it erases data while playing the Star-Spangled Banner.
What is a Worm?
A worm is a self-replicating program that spreads across networks like the Internet, potentially causing damage. It doesn’t require a host program to operate. Worms can be introduced into a network, where they traverse interconnected systems, such as those in corporate or educational settings.
Example Worms
- Alarm Clock Worm: Reaches through networks to make automated calls to users.
- Worm Watcher: Monitors and contains worm growth, shutting them down if they become too large, while keeping a log of changes.
Conclusion
Understanding the nature and types of computer threats such as viruses, Trojans, and worms is crucial for maintaining system security. Using reliable antivirus software and practicing safe browsing habits can help protect your computer and data from these malicious threats.
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