virus

{
  "id": "MLC-T-CYB-004573",
  "term": "virus",
  "field": "Cybersecurity",
  "definition": "1. Type of malicious software that propagates itself by modifying other programs to include a possibly changed copy of itself and that is executed when the infected program is invoked. Note: A virus often causes damage and may be triggered by some event such as the occurrence of a predetermined date.\n\n2. A program that replicates itself by attaching to other programs or files, where it hides until activated.\n\n3. A hidden, self-replicating section of computer software, usually malicious logic, that propagates by infecting (i.e., inserting a copy of itself into and becoming part of) another program. A virus cannot run by itself; it requires that its host program be run to make the virus active.",
  "references": [
    "CNSSI 4009-2022; NIST SP 800-12 Rev. 1",
    "NIST SP 800-28 Version 2",
    "NIST SP 800-82r3 from RFC 4949 (adapted)",
    "NIST CSRC Glossary"
  ],
  "url": "https://mlchart.com/terminology/cybersecurity/virus/"
}