The name of the ransomware that shut down tens of thousands computer system across 104 countries in 2017 is -

- The WannaCry ransomware attack was a global epidemic that took place in May 2017.
- This ransomware attack spread through computers operating Microsoft Windows.
User’s files were held hostage, and a Bitcoin ransom demanded their return.
- WannaCry is an example of crypto-ransomware, a type of malicious software (malware) used by cybercriminals to extort money.
Source: Kaspersky