But City held on to secure their passage through to round five for the first time since 2012.
Speaking to canaries.co.uk, Hanley said: “Especially [scoring] at that end in front of that section of the crowd that were giving me a bit of stick, it was nice.
“It's probably one of the most satisfying feelings I've had in football for somebody that doesn't score many.
“You get stick on the pitch and it's the only way to answer them. I'm pleased with it.
“It's massive for us. It's good to get into the next round of the competition but I think every game we go into, we want to get a result and we want to put in a good performance."