Police are hunting for a callous thief who robbed an elderly woman in a brazen daylight robbery as she was withdrawing money from an ATM on Christmas Eve.

The 80-year-old West Australian woman was withdrawing money from an ATM on Toorak Road, Toorak, about 12.05pm last Monday when the thief struck, police said.

Police are hunting a man following a brazen robbery that targeted an elderly woman. Credit:Victoria Police

CCTV of the incident shows the man casually using his phone and pulling something out of the pocket of his shorts, while the woman uses the machine.