A 60-year-old man was confronted then attacked on his doorstep in Goldie Avenue at about 9.10 pm last Friday night.
The assailant is described as male, white, about six foot tall and of a muscular, athletic build. He was wearing dark clothing.
He ran off after the assault.
The victim did not require hospital treatment.
Police have been carrying out door-to-door enquiries and are checking any available CCTV footage for any additional information.
Detective Constable Scott Ruddick said: “There is currently no known motive for this attack. I’m sure people in the area will have heard or seen this disturbance and I would appeal to them to contact us with any information. In particular, I would ask motorists who were in the area to check their dash cam footage as it may have captured images which could assist our enquiries.”
And enquiries have revealed that two light-coloured taxis were seen driving along Goldie Avenue, between the hours of 9 pm and 9.10pm. Officers are appealing to the drivers of the vehicles to contact them as it’s possible they may have seen the suspect and can provide vital information which could assist the investigation.
Witnesses should ring CID at Loreburn Police Station via 101, or Crimestoppers on 0800 555 111 where information can be given anonymously.