It is a common occurrence for novice users or system administrators to accidentally expose backup directories. If a user backs up their wallet.dat file to a web server, a cloud storage bucket, or a personal server without proper password protection, Google will eventually index it.
To understand the risk, we have to understand the syntax. The term is a combination of Google "Dork" operators and file naming conventions: indexofwalletdat hot
: The core data file for "Core" crypto wallets (like Bitcoin Core or Dogecoin Core). It is a common occurrence for novice users