The 24-year-old's 95th-minute strike on Saturday rescued a 2-2 draw, extended the Black Cats' unbeaten run to four Premier League games and moved them to within two points of safety.
|Evens||Sunderland are Evens with BetVictor to avoid relegation from the Premier League|
"A late goal like that can really bring the confidence in and we'll go into Aston Villa with plenty of it," he told Sunderland's official website.
"We've been doing well at home recently and obviously the fans get right behind us and that'll help, so we need to play our football and try and get the win.
"The games are coming thick and fast and, obviously, when you're in our position it's maybe a good thing because, if we win against Villa, we could be out of the bottom three.
"We've got to look to win our home games and then take what we can away from home."
Colback has made 17 appearances for Sunderland this season, with his goal against Cardiff his first in over two years in the league.