It looks like you exposed for the area around the moon & did not expose for the ball of the moon itself. I agree that your ISO should have been lower and your aperture smaller. I happened to photograph the moon a couple nights ago with a slight haze, but here is what mine looked like with the following settings:
Camera: Canon EOS 50D
Exposure: 0.04 sec (1/25)
Aperture: f/16.0
Focal Length: 380 mm
ISO Speed: 100
I hope this helps!