The chilling moments before lawyer Mahmoud Abbas was shot in his driveway have been revealed as police ramp up attempts to track down the gunman.

Abbas survived the brazen daylight shooting outside his home in southwestern Sydney about 10.25am on July 26.

Police found the 30-year-old criminal defence lawyer suffering gunshot wounds, which were treated at the scene before he was taken to hospital for emergency surgery.

CCTV footage shows the gunman emerging from behind a black Jeep SUV parked across the Greenacre street and charging towards Abbas holding what looks to be a large pistol.

Abbas appears to react with shock to the gunman, whose face is covered by a hood or balaclava, before the footage cuts away before the shooting.

Police believe the gunman might have been waiting in the Jeep, which was recovered a day later in nearby Wiley Park.

Images of the vehicle show a red jerry can in the back seat.

Detectives are appealing for anyone with information about the incident, the identity of the gunman or the movements of the car to come forward.

Abbas has represented several high-profile clients, including members of an alleged ISIS-inspired terror cell charged with plotting to destroy Sydney landmarks.

Police initially seized electronic devices owned by Abbas, including computers and phones, after the attack, but they were forced by a court to return them after he launched legal action.

Lawyers for NSW Police previously said officers were yet to finish reviewing the devices but had found information “highly relevant” to their investigation.

During an August hearing, Abbas’s representatives told a court he needed the devices back to continue running his law firm and he was prepared to make an undertaking not to delete material.

– AAP