In a match shortened to 12 overs each due to heavy rainfall, Sydney Sixers emerged on top as Melbourne Stars came up short again.
Melbourne Stars put on an awful chase but will have another crack to reach the BBL final, with Sydney Sixers heading to the showpiece game.
The Sydney Sixers moved into second in the Big Bash League after victory over the Melbourne Renegades.
Steve Smith made just nine in his first Big Bash League match for six years but Sydney Sixers eased to victory at The Gabba.
Moises Henriques was the star man with a big knock and a vital catch as Sydney Sixers took down Melbourne Stars.
Chris Morris took two wickets and ran out Steve O'Keefe, while Daniel Sams had three as the Thunder beat the Sixers in the BBL.
The Sydney Sixers were 45-2 after being put in to bat by the Hobart Hurricanes when torrential rain forced play to be called off.
It was a knock for the ages from Marcus Stoinis, who helped the Melbourne Stars to a comfortable Big Bash League win over the Sydney Sixers.
Josh Hazlewood marked his 29th birthday in style as his flurry of boundaries secured another win for Sydney Sixers.
Josh Philippe starred with the bat and Matthew Short was dismissed in comedy fashion as the Sydney Sixers downed the Adelaide Strikers.