A "combolist" is a plain-text file containing credentials (often email:password format).
Are you interested in the of the Yahoo data breaches? Download 504K Yahoo Combolist zip
Searching for and downloading these .zip files from forums or "leaks" sites is dangerous: A "combolist" is a plain-text file containing credentials
These files are often "honey pots." Instead of a text list, the zip often contains Infostealers or Ransomware that infects your own computer. Download 504K Yahoo Combolist zip
Update your Yahoo password and any other site where you used that same password.