Malicious Code definition in Computer Security terms:
Definition(s): Software or firmware intended to perform an unauthorized process that will have adverse impact on the confidentiality, integrity, or availability of an information system. A virus, worm, Trojan horse, or other code-based entity that infects a host. Spyware and some forms of adware are also examples of malicious code.
Source(s): CNSSI 4009-2015 (NIST SP 800-53 Rev. 4)
NIST SP 800-128 (NIST SP 800-53)
NIST SP 800-171 (Updates to version published June 2015)
NIST SP 800-53 Rev. 4
A program that is written intentionally to carry out annoying or harmful actions, which includes Trojan horses, viruses, and worms.
Source(s): NIST SP 800-28 Version 2
See malicious code and malicious logic.
Source(s): CNSSI 4009-2015 A program that is inserted into a system, usually covertly, with the intent of compromising the confidentiality, integrity, or availability of the victim