In a major boost for the Brumbies and Wallabies, it can be revealed the Fijian-born star is close to signing a new contract as the ACT side charges towards the Super Rugby finals.

Kuridrani scored a hat-trick in a 22-10 win against the Pretoria Bulls on Friday night, securing a crucial bonus point and ensuring the Brumbies would stay at the top of the Australian conference for at least one more week.

The 28-year-old is timing his run perfectly to reclaim the Wallabies' No. 13 jersey after failing to play a Test last year.

The last three weeks of the Super Rugby regular season will decide which Australian team, or teams, play in the finals and will give Wallabies coach Michael Cheika help in framing his World Cup squad.

Brumbies coach Dan McKellar backed in-form trio Kuridrani, Pete Samu and Christian Lealiifano to make their respective Wallabies comebacks after stepping up this season.

Kuridrani hasn't played a Test since 2017, but his first extended pre-season in six years gave him a chance to drop six kilograms and add speed to his power.

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"In the past it's been me crashing it up, but now we're mixing it up to keep teams guessing," Kuridrani said.

"I feel like I'm finding some form, which is good. That's off the back of the pre-season I had. I'm playing some good footy and that's keeping my confidence up, hopefully I continue to play like this."

Samu was the shock omission from an extended Wallabies squad last week after it was revealed he missed part of a previous camp for personal reasons, leaving question marks over his World Cup hopes.

Cheika lured Samu back to Australian rugby this year after winning back to back championships with the Canterbury Crusaders and he is starting to hit top form in the Brumbies back row, which has been playing without David Pocock, Lachlan McCaffrey and Rob Valetini.

Asked if Samu had a point to prove to Wallabies selectors, McKellar said: "Probably. Pete's a pretty cruisy guy, he'd be disappointed [to be left out], no doubt.

"But he's still got plenty of time, if he keeps playing well for the Brumbies and we go deep into the competition then selection will take care of itself."

Brumbies captain Lealiifano is also staking his claim for a return to the Wallabies for the first time since 2016. The 31-year-old has been the Brumbies' steady hand this year and has started to return to his best after his battle to overcome leukaemia.

Lealiifano was one of four playmakers invited to the Wallabies camp last week, teaming up with Bernard Foley, Matt Toomua and Quade Cooper.

"He'd be my 10 [at the World Cup], but I'm a little bit biased," McKellar grinned.

"He's been outstanding, just consistently good every week and off the back of his defence, his leadership and direction.

"There was a key point in the game there with 10 or 15 minutes to go and he just had the boys connected and we do a lot of work on that, just delivering a key message, his leadership has been outstanding."

The Brumbies have already won more games than they did last season and are positioning themselves for a return to the play-offs. They will play the Japan Sunwolves, NSW Waratahs and Queensland Reds in the last three games of the regular season.

The Brumbies will make a decision on Pocock's immediate playing future this week, but they are confident they can be a genuine championship threat this season even if he's unable to play.

"We left our run a little bit late last year. This year our turning point was against the Crusaders and we've [since] really developed some stuff in our game," said Sam Carter.

"It's really in our own hands now and we're just focusing on what we need to do to get those games. We wanted a squad mentality this year with blokes being rested [for the Wallabies]." Lealiifano has copped a knock on his neck, but is expected to be free to play the Sunwolves this week.