Mateo 10:8

Heal the sick, raise the dead, cleanse the lepers, cast out demons; freely ye received, freely give.

There is no suggestion here that Judas was in any manner excluded from the power and ability conveyed by this commission, if Judas was, even at this hour, a servant of Satan, it would lend color to the charge of the Pharisees that Jesus cast out demons by the prince of demons. Of course, no such thing occurred. Therefore, this is proof that at the time of the commissioning of the Twelve, Judas was not yet fallen from his apostleship, for he did FALL (Acts 1:25).