The Ibrox star has been accused of breaching SFA gambling rules and is under investigation by the Hampden hierarchy for bets placed over a seven-year period.
Gers skipper McCulloch said: "It has been business as usual. We trained yesterday and everyone was buzzing about. It's important we put a marker down for the other teams in the league watching that we're out to play and score goals.
"Hopefully we can do that [tonight against Airdrie] and then have the weekend off to recover for our game on Tuesday. He [Black] is one of the boys, definitely. Always will be.
"He got a wee bit of stick last season and that was over the top. If anyone had to get stick, it should have been levelled at the full team rather than singling people out in some games.
"This season he's been fitter and sharper and you can tell that he has a wee bit about him and he's got his confidence back.
"The way he's passing the ball well with both feet, when he's tackled he just gets up and gets on with it. He's certainly done well since pre-season."