Det er en god del angrep rettet mot AppleID om dagen og det anbefales å endre passordet på Apple kontoen og aktivere 2-stegs verifisering her;
https://appleid.apple.com/
Turn on two-factor authentication for your Apple ID
Two-factor authentication is currently available to iCloud users with at least one device that's using iOS 9 or OS X El Capitan or later. Learn more.
You can follow the steps below to turn on two-factor authentication.
On your iPhone, iPad, or iPod touch with iOS 9 or later:
Go to Settings > iCloud > tap your Apple ID.
Tap Password & Security.
Tap Turn on Two-Factor Authentication.
On your Mac with OS X El Capitan or later:
Go to Apple (?) menu > System Preferences > iCloud > Account Details.
Click Security.
Click Turn on Two-Factor Authentication