if thats your biological brother and only for visit visa you can go down to the visa office fill up the form with your passpor copy, his passport copy, pau QR 100. And you get the visa in few hours.

I did it with my mom few days ago ... i submit the application, pay QR 100, they give me the receipt and the visa number with the website address. I get home ... and check the site 2 hrs later the visa is there.

Very impressed ...