And as the virus author, you've never seen Linux, have no idea about anything past the C64, including bioses, CPU structure, APIs, PCI/etc architecture, and all other computing hardware, and?
That's being friendly, because they'd be interfacing with computing systems hundreds, thousands, or millions of years more advanced, written by aliens, which view the universe entirely differently due to different brain structures, with an unknown number or type of senses, with an unknown way those senses work or are perceived, with "code" not necessarily in binary, or using silicon based chips, or even transistors, or.. well, this part never ends.
The premise is immensely absurd.
Of course it is a movie, but this sort of canon puts it into soft scifi, if not fantasy.