Use legitimate data breach monitoring sites like Have I Been Pwned or the Cybernews personal data leak checker to see if your data has been exposed in known breaches.
If a corporate email is included, it can be used to launch fraudulent invoices or gain entry into corporate networks. What to Do If You've Been Compromised
Your email address becomes part of a validated, active list sold to spammers and phishing operators. 330K MAIL ACCESS.rar
Set up 2FA/MFA (preferably using an app, not SMS) on all important accounts (email, banking, social media). Even if a hacker has your password, they cannot log in without the second factor.
I can also help you find a reputable password manager if you'd like. Personal Data Leak Checker: Your Email & Data - Breached? Use legitimate data breach monitoring sites like Have
Because these lists are frequently generated by "infostealer" malware, run a full system scan on your computer to ensure your device isn't still infected. Best Practices to Stay Secure
Hackers take the email/password pair and automatically try them on thousands of websites (banks, social media, shopping sites, streaming services). Set up 2FA/MFA (preferably using an app, not
They contain pairs of username/email addresses and passwords (or password hashes).