Your login email or password has been changed without your input. Friend requests are sent to people you don't know.

: Malicious software installed on your device can record every keystroke, capturing your email and password as you type them.

: Some attacks rely on the "kindness of friends". For example, a hacker may message you from a friend's already-compromised account, asking for a code sent to your phone or help with a password recovery, effectively using you to unlock your own account for them.