The primary threat from this file is credential stuffing . Malicious actors use these lists to automate login attempts across other unrelated services (like banking or social media), exploiting the fact that many users reuse the same password across multiple accounts. "Collection #1" Data Breach - Cloud Security Alliance (CSA)
The file is a component of a massive series of data leaks discovered in early 2019, commonly referred to as "Collection #1–5." This specific file represents a curated aggregate of billions of usernames and passwords harvested from thousands of previous data breaches. Report: ExLic_Collection-2019-10.rar ExLic_Collection-2019-10.rar
The collection primarily contains email addresses and plaintext passwords . The primary threat from this file is credential stuffing
