Be careful of all the CORONA emails!
There are different ways for attackers and hackers to get your sensitive information based on social engineering or malicious code or even the key loggers. It happens when you simply open their malicious emails or its attachments or clicking on the links inside the emails.
For more information take a look at the following Video.
If you installed malicious Coronavirus Tracker app that locked your smartphone and requested ransom, use "4865083501" code to unlock it. Key is hardcoded. https://twitter.com/ESETresearch/status/1239820488110718976?s=20