You click a link to "download" the video, but instead, you download an .exe or .zip file. Once opened, it installs a Trojan —a piece of software that gives a hacker remote access to your webcam, saved passwords, and banking info.

The link takes you to a fake landing page (looking like a video host) that asks you to "Verify your age" by logging in with your Google or Facebook account. Congratulations—the hacker now has your login credentials. 3. How to Spot the Trap

Even if the subject line changes, the red flags remain the same: