Turn on Two-Factor Authentication (authenticator apps are best) on all sensitive accounts.

If you are concerned that your email is part of such a leak:

Visit haveibeenpwned.com to see if your data was leaked.

Possessing stolen data can be a criminal offense depending on your jurisdiction.

These files are usually —massive collections of usernames, email addresses, and passwords stolen from various websites during data breaches. Format: Usually email:password or username:password . Source: Credential stuffing attacks or database leaks.

Interacting with these files can compromise your own security and legal standing. 1. Malware Infection