Great. Next time, you can even ask the attacker in your dream, what he or she wants from you.
You might get an interesting response.
Or even better, you can ask what you can help them with.
There is an interesting book by Tsultrim Allione "Feeding your demons".
Very powerful, deep stuff and I would strongly advise against playing around with it.
Yet, handled appropriatly, it may be extremely useful.