Malicious Software: The Differences Between Computer Viruses

The term ‘computer virus’ is perhaps the most well-known name for a cybersecurity threat. It gets tossed around as a cover-all for anything that invades your computer system. A virus infects your files or programs through human interaction. It is only able to intrude on your operating system by attaching itself to an existing file and tagging along for a ride. As the file is shared or sent via email, the virus leaves infection in its wake.

One bit of good news is that almost all viruses end up attached to executable files. This means that the virus might be on your computer, but it cannot actually infect your computer unless someone opens or runs the malicious program. Viruses can range pretty wildly in severity. Some cause annoying side effects while others will damage software and cause denial-of-service conditions.

This malicious bit of software gets its name from the Trojan War and the subterfuge of hiding a threat within a legitimate source.  At first glance, a trojan horse will appear as if it is useful or trusted software. Then, once you install or run the program, it will begin to do its damage. These are some of the most difficult forms of malware to avoid because they can be so well-hidden.

The severity of a trojan horse assault can vary widely. Some trojans will have harmless effects like altering your desktop or adding confusing icons. Other forms can have a severe impact, like deleting files, destroying information, or creating a backdoor into your operating systems. This can put your personal data at risk. A major difference from viruses and worms is that trojan horses cannot reproduce on their own.