Hidden php directory

I've recently had what looks like an attack on a web server. The
machine is running iis 6 on windows 2003 server. with php 5.0.3 and
mySQL 4.1.8 installed and running. The attack has deleted my phpMyAdmin
folder plus files and has hiddene the C:\php directory. The folder
isn't visible in Windows Explorer, but it can be viewed with the
command line using the Run application. It also appears the folder with
php in their name are also not visible.
If anyone has any idea whatmight be causing this phenomena, please
send whatever knowledge you have.


Thanks in advance,


Mario Giorno
pariahstudio