From the doc: 'infects batch, text and ANSI
files - if ANSI.SYS is running it replicates when
the infected file is typed to the console if the
file isn't renamed, see last line. Uses DOSKEY to
go 'resident' and infect files whenever DIR is
used. Ignore the dumb comments, I must of been
stoned or something. DOS 6 only please.'