He Won Praise for Halting a Global Cyberattack. Then He Was Arrested.

Marcus Hutchins, the researcher, was widely praised for identifying a way to disable the WannaCry malicious software, or malware, attack that seized hundreds of thousands of computers this year. Researchers credited Mr. Hutchins’s discovery of a so-called kill switch in the malware for stopping its spread and preventing the attack from infecting millions more computers.

According to an indictment filed in federal court in Milwaukee that was unsealed on Thursday, Mr. Hutchins, 23, and an unidentified accomplice conspired to create and sell malware intended to steal login information and other financial data from online banking sites.

https://www.nytimes.com/2017/08/03/technology/cybersecurity-researcher-hailed-as-hero-is-accused-of-creating-malware.html