Microsoft took over sysinternals.com as mentioned and in so doing is replacing regmon and filmon with the Sysinternals Process Monitor.
Process Monitor
This looks to be the information requested for months in my pleas to help find out what is causing problems on a machine in past articles (of course I am just one of the many...) I haven't tried it yet but if it lives up to the description it could be very useful if and when you suspect hacking on a machine - to verify and validate every process and user and what they have been up to.