We are often asked what the differences are between malware and viruses and why an anti-virus cannot stop everything. This week I’d like to try to help out a little.
Malware (malicious software) is the big umbrella term. It covers viruses, worms, trojans, adware, spyware etc. Malware can be unwittingly downloaded from infected bogus email attachments, USB sticks, pirated material and hijacked websites.
There are 2 major categories of malware: hidden and visible.
This is malware that is predominately installed without the user’s knowledge. Its intention is to cause damage or for financial gain:
Virus - this may corrupt or delete data on your computer or even delete everything on your hard disk. Viruses spread when the software or document they are attached to is transferred from one computer to another.
Worm - a malicious computer program that is able to copy itself incredibly quickly from machine to machine, usually by exploiting a security hole in a piece of software or the operating system.
Trojan - like the mythical Trojan horse, they are often disguised as a piece of software that looks innocent. Trojans are one of the most common methods a criminal will use to infect your computer and collect personal information.
Visible Malware (Grayware)
Grayware refers to applications or files that are non-malicious, but can still adversely affect the performance of a computer:
Spyware - installs components on a computer for the purpose of recording internet surfing habits. Spyware sends this information to its author or to other interested parties when the computer is online.
Adware - displays advertising banners on web browsers, which many computer users consider invasive. Adware programs often create annoying pop-up ads and a loss of network connection or system performance.
PUPS (Potentially Unwanted Program) – software that uses high amounts of system resources and is a common cause of spam e-mails and slow systems.
The reason your anti-virus won't stop all types of malware is because the release rate of malware is so high. New malware is released on a daily basis and the anti-virus companies just cannot keep up. We advise that you protect your computer as best you can by:
Keeping up-to-date with the latest operating system updates and patches.
Installing anti-virus software and downloading updates.
Ensuring that Adobe Flashplayer is up-to-date. Use their official website (never use a pop-up which informs you that you need to update it): https://get2.adobe.com/flashplayer/
THINK BEFORE YOU CLICK. The best way to prevent a malware infection is YOU. Avoid downloading and installing anything you do not understand or trust.