Essentially the email comes from your email address and is sent to your email address. A “hacker” claims to have hacked your computer through your router, sometimes even listing a specific router and a specific time that you were hacked..
The scam email goes on to suggest that you were looking at adult websites and that the hacker turned on your web cam and has actual footage of you and the adult content you were looking at.
The “hacker” says that unless you sent them money through bitcoin that they will email everyone you know about you. You have 48 – 55 hours to send the bitcoin or they will release the information they have on you. If you pay them, they claim this information will go away and be destroyed.
Here is a sample of what the email looks like, they vary in detail but the content is nearly identical: