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Why is malware a serious threat to you?
Malware is a broad term that includes several types of software with one shared characteristic: they are designed to cause harm in the infected system. Online criminals spread malware to carry out cyber attacks. Although nowadays malware spreads mostly through the internet, malware has been used to cause harm long before most devices were online. Before the time of the internet, malware could be spread with floppy disks, for instance.
The goals of spreading malware range from stealing people’s personal information to hijacking the victim’s computer, and more. And it is not only desktop computers that are at risk of getting infected by malware. Mobile devices, such as smartphones, are equally tempting targets for online criminals.
The biggest threats caused by malware include:
Stealing credit card information or money from your bank account
Stealing personal information for identity theft or blackmailing
Stealing passwords and login credentials for account takeover
Locking your device or files and demanding ransom
Destroying files and wiping out data
Stealing sensitive personal photos
Gathering information about your workplace and its systems
Forcing your device to spread malware or spam to other users’ devices
Using your computer for mining cryptocurrency
Spying on what websites you visit or what you type on your keyboard
Using your device to carry out DDoS attacks as a part of a botnet
Different types of malicious software
Although the technology to fight against malware gets better, online criminals, hackers and state-funded entities are always looking to develop new forms of malicious software. Here are a few common types of malware to look out for.
Virus
Computer viruses are some of the most common and well-known malicious programs. They inject malicious code into another computer program — usually through some pre-existing security vulnerability within the program. The code gets to work once the infected program is executed. This may result in corrupting and wiping out the infected device’s memory or preventing it from starting up, and many other things.
Trojan horse virus
A trojan horse virus looks like a normal file or piece of software. In reality, it is a virus in disguise, looking to corrupt your files, steal confidential and sensitive data, or spy on what you do on your device. Trojan viruses can bring with them many different types of malware.
Ransomware
Online criminals use ransomware to encrypt the infected device’s files so they cannot be accessed by the user. The catch is that the victim has to pay a ransom if they want to get their files back. Online criminals prefer cryptocurrencies, such as bitcoin, for the payment of ransom, as they are more difficult to track. There is no guarantee that you get your files back by paying the ransom. The payment only encourages criminals and can be used to fund organized crime and terrorism. Contact your local authorities instead of paying.
Spyware
Spyware is used to steal different kinds of data from your device and keep track of what you do. The goal of spyware is to do its work quietly in the background without the user ever noticing its presence. So-called keyloggers are able to track what you type on your computer keyboard to steal passwords and login credentials. Spyware can also be used to record your screen to capture other information for carrying out identity theft and account takeover, for example.
Computer worms
Worms are especially hard to deal with as they are able to duplicate and spread from one device and network to another. To make matters worse, a worm can spread from one device to another even if the user does not do anything. The worm might be noticed only once it has spread enough to cause serious damage.
How to defend against malware?
Malicious software comes in different forms and you need to know how to defend yourself against them all. Some malware can be dealt with in particular ways, but there are some things you can do to improve your overall cyber security against them all. Here’s how you can better protect yourself against malware on all of your devices.
Use an antivirus. An antivirus program offers extensive protection for both your desktop computer and smart mobile devices.
Keep your device’s operating system and applications up to date. Always make sure to download the most recent official updates. In addition to adding new features, software updates fix bugs and plug holes that can be used by online criminals to hack into your device and spread malware.
Be careful which programs you download. Mobile devices are usually considered safe as applications are downloaded and installed from the device’s official app store. You should still be wary of what you choose to download on your device.
Do not click suspicious links. Emails, text messages, posts on social media and websites can contain links to malicious websites and can make your device vulnerable to malware. Inspect URLs carefully and never click them if they seem sketchy or are sent to you by someone you don’t know. You may in fact be a target of a phishing attack.
Avoid inserting unknown hard drives into your computer. In addition to files downloaded from the Internet, malware can spread from hard drives, CDs, USB sticks and other physical devices. Make sure not to plug unknown drives into your computer or allow someone you do not trust to connect their smartphone or external hard drive.
Check what mobile apps and computer programs have access to. Many mobile apps require access to your phone’s camera, address book, location information, and saved files, for instance. Before granting access, think carefully if the program really needs access to everything.
Be careful when browsing in public. Public Wi‑Fi can be helpful when working remotely on the go or studying at a local cafe. Unfortunately, you cannot always be sure of the network’s safety. Avoid public Wi‑Fi if you can or use a VPN.
Use a firewall. A firewall acts as a filter between your device and the internet. It can protect you by stopping suspicious and potentially harmful network traffic. Although a firewall can stop hackers and viruses, it needs an antivirus to back it up.
7 tips for identifying a malware infection
If your computer or mobile device is no longer working as it should or you have noticed some strange changes in it, there may be a piece of malware hiding on your device. Here are seven signs that can help detect malware.
Suspicious and unexpected pop-up windows
The device is working slower than it should
It takes longer than normal to start up or shut down
Unexplained increase in the use of data
The device and programs crash or freeze repeatedly
The battery of your device is drained faster than normally
Your device overheats for no apparent reason
All devices start slowing down as they age and can no longer maintain the charge of their battery as they used to. You should still make sure that the signs of aging are not in fact caused by malware. If you notice any of these signs, make sure to run a virus check on your device. This is an easy process with the help of advanced security software.
