| 1. 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.
(Source: RFC 2828)
2. An unwanted program which places itself into other programs, which are shared among computer systems, and replicates itself.
(Source: ATIS)
NOTE A virus is usually manifested by a destructive or disruptive effect on the executable program that it affects.
3. Self-replicating, malicious program segment that attaches itself to an application program or other executable system component and leaves no obvious signs of its presence.
(Source: ATIS) |