These lists are rarely from a single source. They are created by merging data from numerous security breaches, phishing scams, and infostealer logs.
To give you the most relevant information, are you looking into this for: (checking if your credentials are safe)? Cybersecurity research or testing? Protecting a business from credential stuffing? Combolists and ULP Files on the Dark Web - Group-IB Download 97M Combolist rar
Many entries in these massive, older lists are recycled or repackaged, meaning the passwords may have already been changed by users. Risks of Downloading and Using Such Files: These lists are rarely from a single source
Cybercriminals use these lists for "credential stuffing" or "brute-force" attacks, testing the pairs on various websites (banking, social media, e-commerce) to gain unauthorized access. older lists are recycled or repackaged