Didn't this answer work for you?
It was a start. I need to rotate an image file the same way.
Place the image inside of a Movie Clip instance.
Here is the exact example of what I want, but it seems that I'm missing something.
I finally got it 🙂 such a RELIEF 🙂
var _this = this;
var radians = Math.atan2(e.localY - _this.movieClip_1.y, e.localX - _this.movieClip_1.x);
var degrees = radians*(180 / Math.PI);
_this.movieClip_1.rotation = degrees - 90;