A (or "combo") is a massive compilation of stolen usernames, email addresses, and passwords. Unlike raw data from a single breach, these lists are cleaned and structured—typically in a username:password or email:password format—so they can be fed directly into automated software.
How to Recognize a Malware Email | DECS - MSU College of Engineering 110K HQ COMBO EDU.txt
Cybercriminals seek out educational email lists for several high-value reasons: A (or "combo") is a massive compilation of