Kronos (malware)

Kronos was a type of banking malware first reported in 2014. It was sold for $7000.

As of September 2015, a renew version was reconnecting with infected bots and sending them a brand new configuration file against U.K. banks and one bank in India.

Similar to Zeus it was focused on stealing banking login credentials from browser sessions.

In August 2017, British security researcher Marcus Hutchins (aka 'Malwaretech') notable for his involvement stopping the May 2017 WannaCry ransomware attack was arrested by the FBI whilst visiting the United States. He was alleged to have created the software in 2014, and to have sold it in 2015 via the AlphaBay forums.

...
Wikipedia