A joint operation with investigators and judicial authorities from six different European countries, supported by Europol and Eurojust, has dismantled a major cybercriminal group during a coordinated action in Ukraine. Five suspects were arrested and eight house searches were carried out in four different cities in which were seized a variety of computer equipment and other devices for further forensic examination. The detainees are suspected of development, exploiting and distribution of the two known banker Trojans (Zeus and SpyEye) and channelling and cashing-out their crimes. Criminals adapted banking Trojans to circumvent security measures and to attack online banking systems in Europe, among other places. This action was part of the wider investigation that was launched in 2013 by the JIT members (Austria, Belgium, Finland, the Netherlands, Norway and the United Kingdom).