What Is Malware and How Does It Affect My Computer?
Malware is software designed to execute unauthorized processes with adverse impacts on the confidentiality, integrity or availability of an information system. It may also be referred to as viruses, worms, Trojan horses or spyware. Malware is distinct from computer hacking tools such as cryptojacking (using computing power to verify blockchain transactions, thereby earning cryptocurrency) and other attacks like distributed denial-of-service attack (DDoS).
A full history of malware would be a long read; however, it’s important to note that malware has been around since the early 1970s when the Creeper virus made its debut. Malware today is much more sophisticated and can deliver its payload in a number of ways, from demanding a ransom to stealing personal and confidential data.
Often, malware is introduced into the system via email attachments or malicious websites, which cybercriminals design to lure unsuspecting users into clicking on them. Once clicked, they install malware and subsequently exploit the host’s systems. Malware can also infect a device or network through peer to peer file sharing platforms or other similar means. Lastly, malware is increasingly deployed through “malvertising,” which is the practice of injecting malicious code or malware-laden advertisements into legitimate online advertising networks and webpages. Other common signs of a malware infection include a slow computer, frequent crashes and/or the onset of numerous pop-ups. These are often designed by cybercriminals to entice users into executing the malicious software on their devices, or they might be a sign that cryptojacking is taking place.