BleepingComputer: Ransomware attacks need less than four days to encrypt systems
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[1]https://www.bleepingcomputer.com/news/security/ransomware-attacks-need-less-t
han-four-days-to-encrypt-systems/

References

   1. https://www.bleepingcomputer.com/news/security/ransomware-attacks-need-less-than-four-days-to-encrypt-systems/