The 23-year-old joined AIK on loan at the beginning of the season, but his spell with the club is due to come to an end in December.
"Mohamed has a great history with our club. He is performing well so in the near future we will have a discussion with Celtic to see what their plans are for him," Wesstrom told the Daily Record.
"He's a Celtic player and they have a mandate to do as they wish. But we'll speak to them and will know how to proceed when we have done that.
"Finances would be an issue. We are not even close to the same level as Celtic but we will see the outcome."
Bangura has scored three goals for the club this season.