Malware

Definition

Malicious software including viruses, worms, and ransomware that compromises systems.

Technical Details

Malware, short for malicious software, refers to any software intentionally designed to cause damage to a computer, server, client, or computer network. It can take various forms, including viruses, worms, trojans, ransomware, adware, and spyware. Malware operates by exploiting vulnerabilities in software or systems, often entering through phishing attacks, malicious downloads, or compromised websites. Once installed, it can execute harmful actions such as stealing sensitive data, disrupting operations, or allowing unauthorized access to systems. Advanced malware can even employ techniques like polymorphism to evade detection by traditional antivirus tools.

Practical Usage

In the real world, organizations deploy antivirus solutions and endpoint protection platforms to detect and mitigate malware threats. Regular updates and patches are crucial in maintaining system security against malware infections. Security awareness training for employees is also a vital implementation aspect, educating them about the risks of clicking on unknown links or downloading unverified files. Furthermore, incident response plans often include procedures for dealing with malware infections, including containment, eradication, recovery, and lessons learned.

Examples

• WannaCry ransomware attack in 2017, which encrypted files on infected computers and demanded ransom payments in Bitcoin.
• The MyDoom worm, which spread rapidly via email in the early 2000s, resulting in significant disruption and financial loss to businesses worldwide.
• Spyware like keyloggers that secretly monitor user activity and capture sensitive information such as login credentials.

Related Terms