So as with all ransomware, the data on the infected machine is encrypted. And only decrypted upon receipt of a ransom payment. 

Aptly named after the notoriously known character Jigsaw, this particular strand of ransomware will also threaten to permanently delete files. In fact, Jigsaw will delete the entire contents of the machine if the demand for ransom is not adhered to. 

Fortunately though, there is a free Jigsaw decryption tool available (see the link below for additional information). 

As with most things, prevention is better than a cure, so ensure that you maintain a sufficient level of security. 

  • Do not open unknown/suspicious email attachments
  • Update all applications/software as soon as possible
  • Perform regular back-ups