

Malware (short for “malicious software”) is a file or code, typically delivered over a network, that infects, explores, steals or conducts virtually any behavior an attacker wants. And because malware comes in so many variants, there are numerous methods to infect computer systems.
viruses is an important one. Malware is a catch-all term for any type of malicious software, regardless of how it works, its intent, or how it's distributed. A virus is a specific type of malware that self-replicates by inserting its code into other programs.
Malware is usually distributed through malicious websites, emails, and software. Malware can also be hidden in other files, such as image or document files, or even in seemingly innocuous files, such as .exe files.