: Tells the search engine to look specifically for Microsoft Excel files.

Let's break down the three parts:

In a documented case, a security researcher using a simple Google dork query ( filetype:xls OR filetype:xlsx "username" "password" ) discovered an Excel file named "dev_Bank_accounts_2024.xlsx" on a misconfigured banking subdomain. Inside the file were:

Outside, the river glinted like a line in a spreadsheet, separating what is recorded from what floats free. Mara walked home with a new habit: at night she opened a blank document and wrote small entries—dates, names, places, things she noticed—nothing grand. She saved the file with "VERIFIED" in the title and set it aside.

: Hackers sometimes upload "honeypot" files with these names to lure users into downloading them. These files can contain malicious macros or "AI data poisoning" prompts that infect your system once opened. Best Practices for Protection