: They are shared on underground forums or "leaks" sites for users looking to obtain free "smurf" accounts or accounts with specific rare skins without paying [1, 4]. Security and Ethical Risks

: These lists are frequently compiled from older database leaks or "combolists" used in the account-cracking community [2, 5].

: The data is often formatted as username:password or email:password , allowing automated tools to quickly "check" which accounts are still active [2, 4].

: Using these accounts is a violation of Riot Games' Terms of Service. Accounts found on these lists are usually flagged quickly and permanently banned [3, 4].

: Files advertised as "Free ACCs" are high-risk vectors for malware, keyloggers, or trojans . Attackers often bundle malicious executables within the download to infect the downloader's computer [5, 6].