The hackers, who prosecutors mentioned had been led by Mr. Clark, initially used their entry to Twitter’s inside techniques to take over accounts with uncommon consumer names like @darkish and @obscure, which they bought on OGUsers for hundreds of {dollars}. But because the day of the assault wore on, the hackers modified ways. Accounts belonging to celebrities and cryptocurrency firms tweeted messages that promised to double the cash of anybody who despatched Bitcoin.

But the supply was a rip-off. “No Bitcoin currency was returned as promised to these victims,” Darrell Dirks, a prosecutor with the Florida state legal professional’s workplace, mentioned throughout a court docket listening to on Tuesday.

Two different younger males, Nima Fazeli and Mason Sheppard, had been additionally arrested and confronted expenses associated to the hack. Mr. Sheppard’s and Mr. Fazeli’s circumstances are in progress.

Mr. Clark, who appeared in court docket on Tuesday through videoconference, pleaded responsible to the 30 expenses towards him. In a cope with prosecutors, Mr. Clark agreed to a few years in juvenile jail adopted by three years of probation. He additionally agreed to not use computer systems with out permission or supervision from regulation enforcement. If he violates the phrases of the deal, he might face 10 years in grownup jail.

Because Mr. Clark is assessed as a youthful offender underneath a Florida regulation that gives extra lenient sentencing phrases to younger individuals, he could also be eligible to serve a few of his sentence in a boot camp. He turned over the cryptocurrency he owned on the time of his arrest, prosecutors mentioned, and will probably be used to pay restitution to the victims of the hack. He will obtain 229 days credit score for time served since his arrest final yr.

“He took over the accounts of famous people, but the money he stole came from regular, hard-working people. Graham Clark needs to be held accountable for that crime, and other potential scammers out there need to see the consequences,” Hillsborough’s state legal professional, Andrew Warren, mentioned in a press release. “In this case, we’ve been able to deliver those consequences while recognizing that our goal with any child, whenever possible, is to have them learn their lesson without destroying their future.”

David Weisbrod, a lawyer for Mr. Clark, declined to touch upon the plea deal.