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This is a very old thread, don't worry.
It is quite normal for script kiddies to use automated tool to troll the net for unpatched sites (if you look through your logfiles you will see all kinds of attempts). If you do leave your site unpatched when there is a known vulnerability, then sooner or later you will get hit (fact of life of the internet).
Just keep your site patched and backup regularly. If you have a backup then a hack is just a temporary inconvenience (rather than a disaster).