Exploring the crypt: Analysis of the WannaCrypt ransomware SMB exploit propagation(Note: Read our latest comprehensive report on ransomware: Ransomware 1H 2017 review: Global outbreaks reinforce the value of security hygiene.) On May 12, there was a major outbreak of WannaCrypt ransomware. WannaCrypt directly borrowed exploit code from the ETERNALBLUE exploit and the DoublePulsar backdoor module leaked in April by a group calling itself Shadow Brokers....
Source:
Exploring the crypt: Analysis of the WannaCrypt ransomware SMB exploit propagation