WannaCry is a type of ransomware, which is malicious software (malware) that encrypts all the information held on the infected device and demands a ransom payment for the files to be unencrypted.
The WannaCry ransomware spreads using a vulnerability in outdated versions of the Windows operating system. You may be targeted if your computers operating system and application software is not up-to-date.
If your device has been encrypted by WannaCry, you will have an on-screen prompt advising that your data has been encrypted and a demand for payment for it to be unencrypted..
We don’t recommend you pay the ransom as this encourages further attacks and there is no guarantee that your files will be made accessible again. It is important to bear in mind that whatever steps are taken there is no guarantee your data will be recovered.