It happened in the Burneys Mews area of Newtownabbey on Friday, January 11.
Police say it was reported that at around 7:30 pm two males and a female forced their way into a flat in the area and assaulted the male occupant with what was described as a flick stick.
The 25 year old male was taken to hospital for treatment for a number of lacerations to his head and a suspected broken wrist.
Detective Sergeant Coulter is appealing for anyone who witnessed the incident or anyone with any information that can assist with the investigation to contact Detectives in Antrim on 101 quoting reference 1114 11/01/19.
Alternatively information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.