Kronos was a type of banking Windows malware first reported in 2014.
[2] Similar to Zeus,[3] it was focused on stealing banking login credentials from browser sessions via a combination of keylogging and web injection.
[1][2] In August 2017, British security researcher Marcus Hutchins (aka 'MalwareTech'), previously notable for his involvement stopping the May 2017 WannaCry ransomware attack,[5] was arrested by the FBI whilst visiting the United States.
[6] He was alleged to have created the software in 2014, and to have sold it in 2015 via the AlphaBay forums.
[7][8] Hutchins later admitted to being paid to work on Kronos and its predecessor UPAS Kit (named after the toxic Upas tree) as the main developer between 2011 and spring 2015.