list by Cracked.com lists several movies where Hollywood took liberties with hacking. If you're interested in it as a plot point and not the accuracy of it, then some of the examples on this list might interest you.
Same thing with this
list, which, if nothing else, shows some unintentionally funny hacking scenes.
Finally, TVTropes.org has a whole trope dedicated to Hollywood
hacking. I think you'll find more dramatic, but totally inaccurate examples of what you're looking for, so if authenticity is your thing, you might be out of luck in most cases.