This demo shows how ShieldFS (shieldfs.necst.it/) detects WannaCry and restores all the encrypted files. Interestingly, we unfreeze a virtual machine from February 2016 and successfully defeat WannaCry, which has been released in mid 2017, showing that ShieldFS's detection models can effectively detect also future, unseen ransomware threats. Note that the recovery process is started manually for demo purposes, while ShieldFS can do it automatically and transparently to the end user.