If you’re stuck with dreamsteam.bar malware, you may have a look at this cleanup tutorial:
If you’re getting emails from “hackers” who claim your computer is compromised, just delete them – most likely the information is false. Alternatively, you may reach local authorities or report it to the FBI at https://www.ic3.gov/default.aspx
We’ve seen this type of attack these days.
Many legitimate sites are currently affected by it, resulting in infecting web visitors.
Stay away from these alerts and don’t interact with this malicious page.
If you did interact with it, check out this video tutorial.
How to Fix iPhone Calendar Virus: https://www.youtube.com/watch?v=a6RqiaMs5kY