The victim, aged in her 20s, was attacked between Chapel Street and Church Road, Pelsall, on February 7.
Forensic experts and detectives have examined the scene and collected CCTV footage but so far nobody has been arrested.
The woman has been receiving support from specialist officers since the incident and detectives have said that getting her justice remains the aim.
A spokesman for West Midlands Police said: "We have made no arrests at this time but justice for the woman remains the aim of all of the detectives involved in this ongoing investigation."
Anyone with information is still urged to contact the police by calling 101, quoting crime reference number 20/850122/21.