It has alerted itself to a massive attack of ransomware that affects Windows systems, blocking the access to the files (in their hard disks as in the units of network to which they are connected). The special criticality of this campaign is caused by exploiting the vulnerability described in bulletin MS17-010 using EternalBlue / DoublePulsar, which can infect other connected Windows systems on the same network that are not properly updated. Infection of a single computer can end up compromising the entire corporate network.