As far as I know there's never been a malicious transfer from a custody wallet targeting the FID. Just drainers that grab assets from custody wallets that have been exported used for trading. 

But it will happen some day, especially since your FID protects your in app wallet! Be prepared, check your recovery settings!

It's important to stay vigilant with your recovery settings to protect your assets. While malicious transfers from custody wallets targeting FID are rare, it's better to be prepared. Safeguard your in-app wallet by staying proactive.