Computer threats have been around for decades. In fact, one of the first computer viruses was detected in the early 70s. Technology has come a long way since then, but so have online threats: Spyware, ransomware, virus, trojans, and all types of malware designed to wreak havoc. Here’s how different types of malware work and how you can avoid falling victim.
Once created to annoy users by making small changes to their computers, like altering wallpapers, this type of malware has evolved into a malicious tool used to breach confidential data. Most of the time, viruses work by attaching themselves to .exe files in order to infect computers once the file has been opened. This can result in various issues with your computer’s operating system, at their worst, rendering your computer unusable.
To avoid these unfortunate circumstances, you should scan executable files before running them. There are plenty of antivirus software options, but we recommend choosing one that scans in real-time rather than manually.
Unlike viruses, spyware doesn’t harm your computer, but instead, targets you. Spyware attaches itself to executable files and once opened or downloaded, will install itself, often times completely unnoticed. Once running on your computer, it can track everything you type, including passwords and other confidential information. Hackers can then use this information to access your files, emails, bank accounts, or anything else you do on your computer.
But don’t panic just yet, you can protect yourself by installing anti-spyware software, sometimes included in all-purpose “anti-malware” software. Note that most reputable antivirus software also come bundled with anti-spyware solutions.
Are you redirected to a particular page every time you start your browser? Do you get pop ups when surfing the internet? If either situation sounds familiar, you’re likely dealing with adware. Also known as Potential Unwanted Programs (PUP), adware isn’t designed to steal your data, but to get you to click on fraudulent ads. Whether you click on the ad or not, adware can significantly slow down your computer since they take up valuable bandwidth. Worse still, they’re often attached with other types of malware.
This type of malware works like adware except that it doesn’t make money by tricking you into clicking on ads, but by scaring you into buying a software you don’t need. An example is a pop up ad that tells you your computer is infected with a virus and you need to buy a certain software to eliminate it. If you fall for one of these tactics and click on the ad, you’ll be redirected to a website where you can buy the fake antivirus software.
Scareware acts more like a diversion from the other malware that often comes with it. A good antivirus solution will help scan for scareware too, but you should patch your operating systems regularly just to be safe.
Ransomware has become increasingly common and hostile. It encrypts your computer files and holds them hostage until you’ve paid a fee for the decryption code. Because ransomware comes with sophisticated encryption, there aren’t many options unless you have backups of your data.
There are some tools that can protect against ransomware but we recommend that you backup your data and practice safe web browsing habits.
Similar to viruses, worms replicate themselves to widen the scope of their damage. However, worms don’t require human intervention to replicate themselves as they use security flaws to transmit from one computer to the next, making them far more dangerous than your typical virus. They often spread via email, sending emails to everyone in an infected user’s contact list, which was exactly the case with the ILOVEYOU worm that cost businesses approximately $5.5 billion worth of damage.
The easiest ways to protect your network from worms is to use a firewall to block external access to your computer network, and to be careful when clicking on unknown links in your email or unknown messages on social media.
Usually downloaded from rogue websites, Trojans create digital backdoors that allow hackers to take control of your computer without your knowledge. They can steal your personal information, your files, or cause your computer to stop working. Sometimes hackers will use your computer as a proxy to conceal their identity or to send out spam.
To avoid trojan attacks, you should never open emails or download attachments from unknown senders. If you’re skeptical, use your antivirus software to scan every file first.
In order to keep malware at bay, you need to invest in security solutions with real-time protection and apply security best practices within your office. If you have any questions or concerns, or simply need advice on how to strengthen your business’s security, just give us a call and we’ll be happy to help.
Published with permission from TechAdvisory.org. Source.