[comp.sys.apple] BASIC

GREYELF@WPI.BITNET (03/22/89)

A BASIC program is very capable of introducing a virus into a computer system,
and it need not be something as obvious as a poke statement and a bunch
of data statements.  One very old technique is to package an assembly
program with a BASIC program, and save it as a BASIC file.

This is done by writing the BASIC program, writing the assembler program,
loading the assembler program, adjusting the End Of Progam pointers,
and just saving it like a normal BASIC program.  Then the program
need only execute a call statement once.

This technique was used on the Program Line Editor program by
Beagle Brothers, however many years ago.

--
Michael J Pender Jr  Box 1942 c/o W.P.I.
greyelf@wpi.bitnet   100 Institute Rd.
greyelf@wpi.wpi.edu  Worcester, Ma 01609
I wrote SHELL, please send bug reports to me.