Malware

Software designed to secretly access a computer system without the owner’s informed consent. The expression is a general term (short for malicious software) used to mean a variety of forms of hostile, intrusive, or annoying software or program code. Malware includes computer viruses, worms, Trojan horses, spyware, dishonest adware, ransomware, crimeware, most rootkits, and other malicious and unwanted software or programs.