The attack reportedly took place early Friday morning in the lower courtyard of Henley Hall, and was allegedly carried out by a man in a skeleton mask that had been apparently hiding in some bushes.
The victim, who asked to remain anonymous, was standing in the courtyard near her dorm room on FaceTime with her boyfriend when the attack happened.
She said the man punched her in the face and began to beat her up. The victim, who is a second-degree black belt, fought back and forced the man to flee as she chased him.
The freshman from Hawaii screamed loud enough to attract the attention of other students on campus, who called police. She said she suffered minor injuries and bruises.
The alleged attacker is described as about 6 feet tall with a thin build who was wearing all black clothing and the skeleton mask.
Orange police released surveillance video of the suspect they say was taken moments after the attack.