His brace saw City win 3-1 on the night and reach the final 5-1 on aggregate.
Marmoush said afterwards: "We showed a very good mentality. We were together as a team, from the first minute we were very focused on the job. We showed our mentality and passion and are very happy to reach the final."
"The first goal was very lucky, my touch wasn't the best but the ball went in. I try to make the runs and be in the right place and I am very happy to score two goals.
"I wished to get the hat-trick today but I am very happy to score two goals and it gives us all confidence to win the game and hopefully we can win the final."
The Egypt striker added: It's one of the biggest clubs in the world. We are here to win trophies. We give our best every day to reach these finals and win silverware.
"Hopefully we can do it for all the new players and also the players that were here. They showed us that every medal and every silverware is important."