I need a Certified Ethical Hacker to help recover hacked/stolen Discord accounts

There has been an anonymous hacker targeting my school's club discord server. So far upwards of 3 students' personal accounts have been stolen, with one confirmed having their bank account compromised. We don't know where they came from or who's account was the first to be hit, but we know that the programs used were named: Umbrella_Installer.exe, Umbrella_Jump.exe, and Umbrella_PLUGIN.exe. An IRL friend of the first known victim contacted him via discord, started up a full conversation about game design, and then eventually asked him to test his game. Because of the fact that this was a normal topic for the discord server, and it sounded like a real person, he clicked, and his account was taken and used as a trojan horse for another. We suspect that the friend's account was already hacked and that the hacker was using that account also as bait. At this point, we don't know if the hacking has escalated past the need to click a link, but we suspect so. If possible, getting the accounts, securing the server, and finding out who this hacker is/reporting to the authorities/both would be appreciated.
This was targeted theft against students with possible broader safety concerns for the school and the families of the students. If you are able and willing to help, please do so. I am a student and don't have that large of a budget, but if you want, I can negotiate.