in reply to
Re^2: Two processes of a Perl EXE
in thread Two processes of a Perl EXE
I'm guessing the first process is the one that extracts the perl binary and your sources from the exe, then calls the extracted binary to run the extracted sources as a separate process (to handle crashes better maybe?), and then cleans up the extracted files when perl exits.
At least I seem to recall someone once mentioning some article where someone else said that's how it might more or less work. (In other words, I'm guessing)