Even encrypted files are at risk. Attackers use tools to perform Padding Oracle Attacks or brute-force passwords if the encryption was weakened by older software vulnerabilities.

Even without the password, the file may reveal transaction histories and associated public addresses. How to Secure Your Wallet Data

The phrase typically refers to a specialized search query (often called a Google dork) used to find publicly exposed directories on web servers that contain sensitive wallet.dat files. These files are the default database format for the Bitcoin Core client and contain the private keys required to access a user's cryptocurrency funds. Understanding the Vulnerability

If a wallet.dat file is not encrypted with a strong passphrase, anyone who downloads it can instantly spend the Bitcoin.

Never store unencrypted wallet.dat files on cloud services or public web servers. Use an encrypted external drive or a dedicated hardware wallet for long-term storage.