The next time you see a colleague emailing an Excel file labeled passwords.xls , stop them. The time after that, run a quick Google search for site:yourcompany.com filetype:xls username password . The results might terrify you.
This operator instructs Google to only return search results that are Microsoft Excel spreadsheet files (with the .xls or .xlsx extension). Excel files are frequently used by businesses and individuals to store structured data, making them a prime target for information gathering. 2. username password
For ethical hackers and bug bounty hunters, finding these files is a valid vulnerability report. However, the moment a researcher attempts to log into a system using those credentials without explicit written permission, they cross the line into criminal activity. filetype xls username password
Another common find is files named Network_Devices.xls containing columns for IP addresses, device types, and Telnet/SSH passwords. With this information, an attacker could compromise routers, switches, and firewalls—potentially disrupting critical infrastructure.
However, if you're looking for a way to automate this process or manage multiple files, or if you're looking for additional security features such as username and password protection, you might consider: The next time you see a colleague emailing
Employees sometimes upload internal password trackers or system inventories to public-facing websites, forums, or code repositories.
: This operator instructs the search engine to only return results that are Microsoft Excel spreadsheets (or .xlsx when modified). This operator instructs Google to only return search
When combined as , the search engine returns Excel spreadsheets that likely contain columns labeled “username” and “password” with corresponding data. Many of these files are accidentally uploaded to public web servers, FTP sites, or cloud storage without proper access controls.
Once inside a corporate network via stolen credentials, threat actors often deploy ransomware to encrypt systems and demand millions of dollars for the decryption key. 4. Identity Theft
While filetype:xls "username" "password" is a powerful OSINT (Open Source Intelligence) tool, its use exists in a legal gray area. Accessing a file that was accidentally exposed does not necessarily constitute "hacking" in the sense of bypassing a firewall, but downloading and using those credentials is illegal in most jurisdictions under computer fraud and abuse laws.