The WannaCry/WannaCrypt malware outbreak of May 12th presents a powerful opportunity to reflect upon the endpoint security architecture. With this vaccinator, Minerva takes advantage of malware behavior that avoids infecting the same system twice, once it identifies a mutex infection marker on the machine. This is the last line of defense that allows enterprises to restore files that might have been encrypted. The vaccinator is free to download from the GitHub repository, please follow the instructions in the README file.”]
Source: https://blog.minerva-labs.com/immunize-yourself-from-wannacry