Lasender Sheriff is one of 10 people aged between 15 and 19 charged with attempted murder over an attack on a sleeping teenager in an apartment in the Brisbane suburb of Milton on August 28.

He has been in custody since his arrest soon after the incident, but applied for bail in Brisbane Magistrates Court this week.

Acting magistrate Rowan Silva granted Sheriff bail on Wednesday after hearing submissions the previous day.

Sheriff - who turned 18 six days before the alleged offence - will be subject to conditions like wearing a tracker, residing with his mother and reporting regularly at a police station.

Mr Silva also imposed an overnight curfew and banned Sheriff from contact with his co-accused and witnesses.

He said there was strong evidence Sheriff was at the unit where the alleged offences occurred, but information before the court only made "generalised statements" about the actions of the males present.

The court heard earlier the victim suffered serious injuries and was still on life support in an intensive care ward nearly two weeks later.

Police prosecutor Lauren Archer told Mr Silva said there was no way of knowing whether the victim's condition would improve or deteriorate.

"He's quite agitated," she said.

"He's not obeying commands. There's no meaningful neurological recovery at this stage."

In opposing bail, Ms Archer said there was audio from the lifts in the apartment building depicting the group celebrating after the attack involving a metal bat.

She told Mr Silva police say it was a "targeted attack on the victim".

"They have received a video clip of the assault on the victim during which he is kicked in the head twice while already unconscious and bleeding," she said.

Police allege Sheriff was part of a group called Southside Drillas that was "putting the lives of people at risk".

"This pack mentality cannot be condoned by the courts," Ms Archer said.

Sheriff is also facing a separate charge of wilful damage for allegedly smashing a windscreen by jumping on a car in Brisbane's Fortitude Valley on August 23, the day after his 18th birthday.

But defence lawyer Ashkan Tai said concerns raised about gang activity were only "an opinion of a police officer".

"If (the prosecution are) going to allege a circumstance of aggravation with gang affiliation they should charge him accordingly," he added.

"They have the power to charge with serious organised crime ... and they haven't."

Sheriff's instructions to Mr Tai were that "something had kicked off" in the apartment after the group was invited and let in by girls.

Mr Tai said after spending time in custody Sheriff had realised he was "playing A-grade" and knew where he would end up if he breached bail in the slightest.

He told the court Sheriff - whose mother moved from Liberia in 2003 - was young and completing his final year of school.

Sheriff and Dut Acot, 19, were the only two adults charged over the attack.

The remainder were to face the Children's Court, with media denied access.

Sheriff's matter is to be mentioned in the same court again on September 20, while Acot's case is listed for committal mention on September 27.

Australian Associated Press