Malware is the nickname given to the term malicious software. Malware is defined as any software that is used to interrupt or disrupt computer operations, gather sensitive information, or gain access to certain files or programs and is used for hostile intent.

In order to cause damage malware must be implanted or introduced in some way such as via email. The best-known types of malware include viruses (such as ILOVEYOU), worms (such as Conficker), backdoor (such as Emotet ), spyware (such as CoolWebSearch), ransomware (such as CryptoLocker, and WannaCry), and trojan horses (such as Zbot/Zeus).