With his team trailing 4-2 in the 64th minute, Jarome Luai slid through the Maroons’ defensive line before linking up with centre Bradman Best to cross for their opening try of the match.
Moses then put the match beyond doubt when he sliced through three minutes later.
It was historic for the Blues, becoming just the third NSW team to win a decider at Suncorp and the first since 2005.
The contest was frantic from the opening whistle, with the Blues almost breaking through in the first set of the match.
With the first half drawing to a close, Queensland secured the only points of the opening 40.
The Blues came out fighting in the second half and were soon leading 8-4 before Moses had the last say but with his work done, then had to limp from the field with a biceps injury.
Queensland threw everything at the ball in the dying minutes but NSW held firm for the series win.
Coach Maguire said the players worked hard for each other.
“Something I’ve seen is what they’re prepared to do for each other and for their State,” he said.
“It’s up there, if not the best defensive performances in Origin history.”
Eels star scores try to seal Origin series
PARRAMATTA Eels star Mitchel Moses has helped lead the NSW Blues to a drought-breaking, 14-4 win and the State of Origin series victory over Queensland.