Using specialized software like OpenBullet or Sentry MBA, attackers "stuff" these 250,000 combinations into various websites' login pages to see which ones work.
Services like Have I Been Pwned allow you to check if your email has appeared in public combolists. Combolists and ULP Files on the Dark Web - Group-IB 250k Usa Hq Combo.txt
The "Usa" tag indicates that the credentials within the list primarily belong to users based in the United States or use US-based domains (e.g., .gov, .edu, or specific US service providers). Using specialized software like OpenBullet or Sentry MBA,
