Hacker, Ive done to people, and had it done to me, They are most likely useing a R.A.T.
also known as remote administrative tool
But,im guessing hes from toribash, cause its so simple to get somones ip on toribash, also, maby you got Boted, did you download anything close to that time? some times R.A.T's have to blend say a replay and a ''server'' [bad thing] together and when you download the replay he can literly do anything he wants to your computer. as if it is his or hers own.
Prorat.net is a educational R.A.T that people abuse, go to there forums, and they might have a solution.