On Jan. 11, just before midnight, the victim made a cash withdrawal from the ATM at the Caisse populaire Desjardins on Grande Allée Boulevard in Saint-Hubert.
She was approached by two men, and was threatened with a knife by one of them.
The men stole her money and her keys, then drove away with her car.
The car was found by police later that night.
Police say the man with the knife is about 35 years old, about six feet tall and 180 pounds.
During the robbery he wore a green winter coat, a black tuque, a neck warmer, jeans and glasses.
He speaks French with an English accent.
The other suspect is also about six feet tall and 180 pounds.
He was wearing a brown coat and blue jeans.
Police say they want to remind members of the public not to approach suspects, and should instead call 1-800-711-1800, or dial 911.