You've provided no code or haven't showed anything that you've tried, but there are several ways to do this. I'll leave it up to you to show us the code for the actual file transfers and logging into the remote system, but here's one way to check for last modification time.

#!/usr/bin/perl
use strict;
use warnings;

my $file = "this.file";

if (-f $file){
    my $mtime = (stat($file))[9]; 

    my $modified_ago = time() - $mtime;

    my $modified_ago_minutes = sprintf("%.2d", $modified_ago / 60);

    if ($modified_ago_minutes > 120){
        print "$file\n";
    }
}
[download]

-stevieb