Man saved world wannacry attack now arrested hacking activities 2015

You're referring to the case of Marcus Hutchins, also known as "MalwareTech."

Marcus Hutchins is a British cybersecurity researcher and malware analyst who gained international attention in 2017 for his role in stopping the WannaCry ransomware attack. However, in 2017, he was arrested in the United States on charges of creating and distributing the Kronos banking malware, which was used to steal banking credentials and other sensitive information.

Hutchins was arrested on August 2, 2017, at McCarran International Airport in Las Vegas, Nevada, as he was about to board a flight back to the UK. He was charged with four counts of conspiracy, conspiracy to commit computer fraud and abuse, and aiding and abetting computer fraud and abuse.

The charges against Hutchins were related to his alleged involvement in creating and distributing the Kronos malware between 2014 and 2015. According to the indictment, Hutchins and his co-conspirators used the malware to steal sensitive information from victims, including login credentials, credit card numbers, and other personal data.

Hutchins' arrest was met with widespread criticism from the cybersecurity community, with many experts arguing that he was being unfairly targeted and that his arrest would have a chilling effect on the work of cybersecurity researchers and ethical hackers.

In 2018, Hutchins pleaded guilty to two counts of conspiracy and was sentenced to time served, which was approximately 114 days. He was also ordered to pay a fine of $250,000 and to forfeit $14,000 in cryptocurrency.

It's worth noting that Hutchins' role in stopping the WannaCry attack was unrelated to the charges against him. He had discovered a "kill switch" for the malware, which he had registered himself, and had used it to shut down the attack.