Connecting the dots: Notorious cybercrime leader Vyacheslav Penchukov – better known online as Tank – is now serving a nine-year sentence in a federal prison in Colorado, following his orchestration of some of the most destructive banking malware and ransomware campaigns over the past two decades. A report by BBC correspondent Joe Tidy provides an unprecedented look into Penchukov's criminal career, from his days leading the infamous Jabber Zeus syndicate to his later involvement in major ransomware groups targeting international businesses and hospitals.