If you are investigating this file, you should look for the following markers to determine its nature: Open the file in a secure text editor.
Usually formatted as email:password or username:password .
Files with this naming convention frequently appear on forums like Pastebin or in GitHub repositories as "combo lists."
These are often used for credential stuffing attacks . Malicious actors take leaked email/password combinations and test them against the IPVanish login page to see which accounts are active.
If it looks like 192.168.x.x or domain.com , it is a .
IPVanish provides SOCKS5 proxy services in addition to their standard VPN.
If it looks like user@email.com:password123 , it is a .