What is Malware ("malicious software")? [2023]
Malware, short for "malicious software," is a term used to describe a broad category of software specifically designed to harm, disrupt, or exploit computer systems, networks, and user data. Malware is created and used by malicious actors, such as cybercriminals and hackers, to achieve various illicit objectives. It takes numerous forms, each with distinct characteristics and intentions:
Viruses: These are self-replicating programs that attach themselves to legitimate files or software. When a user executes an infected program, the virus spreads and can damage or compromise the system.
Worms: Worms are standalone programs that can replicate themselves and spread independently across computer networks. They can congest networks, cause system instability, and facilitate other malware.
Trojans: Trojans disguise themselves as legitimate software to deceive users into downloading or executing them. Once activated, Trojans can grant unauthorized access to a computer or steal sensitive information.
Ransomware: Ransomware encrypts a victim's files or locks them out of their own system, demanding a ransom for the decryption key. It can result in data loss, financial extortion, and operational disruptions.
Spyware: Spyware secretly gathers information about a user's online activities, passwords, and personal data. It can lead to identity theft and privacy breaches.
Adware: Adware displays unwanted advertisements and can redirect web traffic. While not as malicious as other forms of malware, it can be annoying and invasive.
Rootkits: Rootkits are designed to conceal the presence of other malware or unauthorized access on a system, making detection and removal difficult.
Malware is typically distributed through deceptive methods like malicious email attachments, compromised websites, or social engineering. To defend against malware, individuals and organizations employ cybersecurity practices, including using antivirus software, regularly updating operating systems and software, and educating users about safe online behavior. The fight against malware is an ongoing challenge in the ever-evolving landscape of cybersecurity.