If you suspect your data is part of the "13k Abv.bg Hits" file:
Review all services linked to your Abv.bg email for suspicious activity. 13k Abv.bg Hits-Logs.txt
These are the text files generated by malware (stealers) or brute-force tools that list usernames, passwords, and often secondary data like IP addresses or cookies. Connection to Russian APT Groups If you suspect your data is part of the "13k Abv
Refers to successful logins confirmed by an automated "checker" tool. 13k Abv.bg Hits-Logs.txt