Which of the following best defines malware?

• A. Malware is hostile or intrusive software designed to cause intentional harm
• B. Applications that improve system performance
• C. Backup utilities for data protection
• D. Documentation files for software installation

Answer: (A)

Malware is hostile or intrusive software designed to cause intentional harm. This means programs crafted to damage files, steal information, take control of a device, or disrupt normal operations without the user’s permission. Examples include viruses, ransomware, spyware, and worms, and they often spread by disguising themselves in emails, downloads, or insecure websites. The other options describe legitimate or benign software or files—tools that improve performance, protect data, or assist with installation—so they don’t fit the definition of malware. Understanding malware hinges on recognizing its intent to harm and its covert, unauthorized actions.