Related:

• Trojan horse: [coined by MIT-hacker-turned-NSA-spook Dan Edwards] n.
  A malicious, security-breaking program that is disguised as something benign, such as a directory lister, archiver, game, or (in one notorious 1990 case on the Mac) a program to find and destroy viruses!...
• phage: n. A program that modifies other programs or databases in unauthorized way
  esp. one that propagates a {virus} or {Trojan horse}....
• phage n. A program that modifies other programs or databases in unauthorized way
  esp. one that propagates a virus or Trojan horse....
• worm: [from `tapeworm' in John Brunner's novel "The Shockwave Rider", via XEROX PARC] n.
  A program that propagates itself over a network, reproducing itself as it goes....
• AIDS: /aydz/ n. Short for A* Infected Disk Syndrome (`A*' is a {glob} pattern that matches, but is not limited to, Apple), this condition is quite often the result of practicing unsafe {SEX}.
  See {virus}, {worm}, {Trojan horse}, {virgin}. -- The AI Hackers Dictionary...
• worm n. [from `tapeworm' in John Brunner's novel "The Shockwave Rider", via XEROX PARC] A program that propagates itself over a network, reproducing itself as it goes.
  Compare virus. Nowadays the term has negative connotations, as it is assumed that only crackers write worms....
• mockingbird: n. Software that intercepts communications (especially login transactions) between users and hosts and provides system-like responses to the users while saving their responses (especially account IDs and passwords).
  A special case of {Trojan Horse}. -- The AI Hackers Dictionary...
• virus n. [from the obvious analogy with biological viruse
  via SF] A cracker program that searches out other programs and `infects' them by embedding a copy of itself in them, so that they become Trojan horses....
• cience-fiction fandom:: n. Another voluntary subculture having a very heavy overlap with hackerdom
  most hackers read SF and/or fantasy fiction avidly, and many go to `cons' (SF conventions) or are involved in fandom-connected activities such as the Society for Creative Anachronism....