The summer signing bagged his side's second goal of the game to take his tally to three for the season.
"I want to thank Cassano," said Stramaccioni. "I want to thank all the players because they showed attitude, character and stability. Cassano is proving his worth on the field and this is why we got him."
Inter's third away win out of three this season has moved them up to fourth in the Serie A table.