Dorofeyev cut the lead to 2-1 at 2:10 of the second period. He stole the puck at the Vegas blue line, skated into the zone, and fired a shot that went in off the right post.
Malott scored his first NHL goal when he tipped in a Joel Armia shot at 13:41 to make it 3-1.
“I had a feeling [it was my goal], but it's so hard to tell. A bit of a traffic jam in front,” Malott said. “I felt something. I needed to wait because last time I celebrated a little too early.”
Dorofeyev scored his second goal of the game at 17:32 to make it 3-2, finishing a cross-ice pass from Mark Stone into an open net on the power play. He completed the hat trick with another power-play goal to tie it 3-3 at 19:14.
“The fact that he could finish from over there really makes it tough on teams to get what coverage you're gonna have,” Golden Knights coach Bruce Cassidy said. “They just picked off where they left last year. It was an important time of the game for us.”