A "combo list" (short for "combination list") like the one you mentioned is a large collection of stolen credentials—typically or username:password pairs. These files are often aggregated from various data breaches and distributed through Telegram channels or dark web forums for malicious use.
: A combo list is a compilation of multiple breaches (sometimes called a "COMB") formatted as a plain text file. 100 k HQ Combo LIst By @MailAcessCracker.txt
Below is a breakdown of what such a file represents and the risks associated with it. A "combo list" (short for "combination list") like
: Regularly review bank statements and credit reports for unauthorized activity. Combolists Posted to Telegram Data Breach Below is a breakdown of what such a
: Possessing or distributing unauthorized credentials is illegal under laws like the Computer Fraud and Abuse Act (CFAA) in the US and the GDPR in Europe.