There's nothing more you can do.
I've never(seriously)used any provider except Aol, and though like you I have seen Aol's standard warnings, I have yet to have this nasty email.
It would seem to have a phony source "aol-com" instead of aol.com? Even so, those who don't look might well have downloaded and opened the attachment.
It was a good idea to post in this helproom if only to remind others.