The attack took place last year on Frederick Street, Edinburgh at around 3.20am on Friday, September 4.
Following the incident, police have now released CCTV images of men they believe may hold information which might assist their inquiries into the incident.
Of those captured within the photos, the first man is described as being Asian, 18-30-years-old, medium build, wearing a light pink coloured shirt, blue jeans and white trainers with an item of clothing tied around his waist.
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A second man is described as being Asian, 18-30-years-old, tall and thin build, mid length black hair, wearing a grey t-shirt with dark coloured shirt which is open. Grey jeans and dark coloured trainers.
The third man is described as being Asian, 20-30-years-old, medium build, with long black shoulder length hair and facial hair, wearing a grey shirt carrying a grey jacket, tan coloured trousers and black shoes.
The fourth man is described as being white, 18-25-years-old, medium build, wearing a short sleeved patterned shirt, jeans and dark coloured trainers with a white sole.
Detective Constable Mark Walker of Gayfield CID said: “I would urge each of these four men, or anyone who has information relating to any of these four men, depicted in the images to make contact with the Police.
“Members of the public can contact Police Scotland via the 101 non-emergency telephone number quoting incident number 0657 of 4 September, 2021 or call Crimestoppers anonymously on 0800 555 111.”