Found!

'''Asimov, Isaac. "Found!"''' 1978. Coll. Winds of Change, q.v. under Asimov under Anthologies and Collections.

Computer virus with a difference: "a microcomputer advanced enough to be considered alive"—or at least a self-replicating life-form based in metal/silicon/oil parallel to Terran nucleic acids/proteins/water life (82, 85).