Kronos was a type of banking malware first reported in 2014 and sold for $7,000, it was developed as a follow-up to the UPAS kit that was released in 2012.
Like Zeus, Kronos focused on stealing banking login credentials from browser sessions through a combination of keylogging and web injection. In 2015, its attacks targeted UK banks. British security researcher Marcus Hutchins (aka ‘MalwareTech’), formerly notable for his role in stopping the May 2017 WannaCry ransomware attack but… He was arrested by the FBI while visiting the United States because it was alleged that he created the software in 2014 and sold it in 2015 through the AlphaBay forums.
Remember to protect yourself against these kinds of threats by using reputable antivirus and antimalware programs, as well as keeping systems up to date with the latest security patches and software updates.