: Stolen logs from thousands of different breaches are merged into massive collections.
: These files are then uploaded to cloud services like MEGA or sold on dark web forums to other hackers who use them to take over accounts. Famous "Combo" Breaches
The "cc" in these file names typically stands for or country code , while "combo" refers to a list of credentials. These files are the final product of a digital "pipeline":
: A leak of 26 billion records , largely composed of thousands of previous "combo" lists and data breaches. How to Protect Yourself