In the wake of May’s WannaCry attack, which affected more than 230,000 computers in over 150 countries, a fast-moving malware outbreak was reported June 27 at targets in Spain, France, Ukraine, Russia, and other countries. The attack infected large banks, law firms, shipping companies, and even the Chernobyl nuclear facility in the Ukraine. As with WannaCry, hackers employed malicious software using the EternalBlue vulnerability in older Microsoft Windows systems to rapidly spread across an organization. The new malware is thought to be a variant of Petya, a wiper malware designed to destroy systems and data with no hope of recovery.