While full "stealer logs" contain massive amounts of data—including browser cookies, system hardware specs, and screenshots—they are bulky and difficult to search. To make this data more "marketable," resellers extract the most valuable bits into lightweight .txt files.
Treat every password as if it is already in such a file. Use a password manager to generate unique, random passwords for each site. Enable MFA everywhere. You cannot control breaches, but you can control your own exposure. urllogpasstxt top
url+log+pass, they still cannot log in without the 2FA code.