The search phrase "index of password.txt top" is a query used to locate publicly exposed password.txt files on web servers. It exploits web servers that have directory listing (indexing) enabled. The word "top" often indicates the file is at the root or top level of a web directory.
To protect yourself from the risks associated with password txt files, follow these best practices for password security: index of password txt top
index of: Tells Google to look for web server directory listings. Write-Up: Understanding the Risk of "Index of password
Stay safe, scan your servers, and keep your passwords out of plain sight. White-hat security researchers – May use these searches