These lists are curated for credential stuffing , where attackers use automated bots to test the leaked pairs across multiple popular websites, exploiting the common habit of password reuse.
Experts suggest that many of these lists are bundled together with fabricated data to inflate record counts, making them more attractive for sale on dark web forums or Telegram. 310K COMBOLIST USA.txt
Analysis of similar files in the dump showed a high volume of junk data , including randomly generated or non-existent email addresses and structurally incorrect records. These lists are curated for credential stuffing ,