Definition
Malware, short for malicious software, is any software intentionally designed to cause damage to a computer, server, client, or computer network. It operates by infiltrating systems without the user's consent, often through deceptive means like phishing emails or compromised websites. Understanding malware is crucial for IT professionals to implement effective defenses and protect sensitive data. For instance, ransomware encrypts files and demands payment for their release, a common and disruptive threat. Unlike viruses, which replicate themselves, malware is a broader category encompassing various types of harmful code. This concept is fundamental to cybersecurity domains covered in certifications like CompTIA Security+ and CISSP.