In August 2025, researchers identified a sophisticated phishing campaign where cybercriminals exploited Google AppSheet—a legitimate Google service—to send phishing emails from @appsheet.com addresses. These fraudulent emails claimed copyright violations and threatened to disable victims' Facebook accounts within 24 hours, tricking users into clicking a "Submit an Appeal" button that led to credential theft.
How to Prevent Directory Listing and Protect Sensitive Files
If you are a web developer or site owner, ensure your website does not appear in an "index of" search:
This query is primarily used by attackers to find leaked access tokens or login information from poorly secured websites that interact with Facebook. If a website you use stores your credentials in an unencrypted .txt file and its server directory is open, your data could be exposed. How to Protect Your Account
: Enter your email to see if it has appeared in any known public data leaks.
: Facebook, now Meta, has implemented various security measures to protect user accounts, including 2FA, login alerts, and reviewing suspicious activity. Users are encouraged to use these features to protect their accounts.
: Use passwords at least 12 characters in length, combining uppercase letters, lowercase letters, numbers, and special characters. Even longer passwords of 20-25 characters provide substantially better protection against brute force attacks.
The gap between "it won't happen to me" and "I've been hacked" is often just a simple Google search away.
Most web servers (like Apache or Nginx) are configured to display a standard web page when a user visits a URL. However, if a directory lacks an index file (such as index.html or index.php ) and directory browsing is enabled, the server will list all files inside that folder. This list always begins with the text "Index of". Attackers look for this phrase to find unprotected server directories. 2. "password.txt"
Indicates an exposed, publicly viewable server directory.
If you are a developer or server owner, you must ensure your sensitive files aren't indexed by search engines:
: The query intitle:"index of" passwords.txt instructs Google to find pages where the directory index is public and a file named passwords.txt exists.
Attackers use these queries to find password.txt or .env files. If these contain real credentials, the associated accounts (including Facebook accounts or server databases) are instantly compromised.
: If directory browsing is enabled, anyone can view, download, and read the files.
While a robots.txt file will not stop a malicious hacker, it instructs legitimate search engine crawlers not to index sensitive directories. Add disallow rules for your configuration and admin folders to prevent accidental exposure on public search engines. Conclusion
In August 2025, researchers identified a sophisticated phishing campaign where cybercriminals exploited Google AppSheet—a legitimate Google service—to send phishing emails from @appsheet.com addresses. These fraudulent emails claimed copyright violations and threatened to disable victims' Facebook accounts within 24 hours, tricking users into clicking a "Submit an Appeal" button that led to credential theft.
How to Prevent Directory Listing and Protect Sensitive Files
If you are a web developer or site owner, ensure your website does not appear in an "index of" search:
This query is primarily used by attackers to find leaked access tokens or login information from poorly secured websites that interact with Facebook. If a website you use stores your credentials in an unencrypted .txt file and its server directory is open, your data could be exposed. How to Protect Your Account
: Enter your email to see if it has appeared in any known public data leaks.
: Facebook, now Meta, has implemented various security measures to protect user accounts, including 2FA, login alerts, and reviewing suspicious activity. Users are encouraged to use these features to protect their accounts.
: Use passwords at least 12 characters in length, combining uppercase letters, lowercase letters, numbers, and special characters. Even longer passwords of 20-25 characters provide substantially better protection against brute force attacks.
The gap between "it won't happen to me" and "I've been hacked" is often just a simple Google search away.
Most web servers (like Apache or Nginx) are configured to display a standard web page when a user visits a URL. However, if a directory lacks an index file (such as index.html or index.php ) and directory browsing is enabled, the server will list all files inside that folder. This list always begins with the text "Index of". Attackers look for this phrase to find unprotected server directories. 2. "password.txt"
Indicates an exposed, publicly viewable server directory.
If you are a developer or server owner, you must ensure your sensitive files aren't indexed by search engines:
: The query intitle:"index of" passwords.txt instructs Google to find pages where the directory index is public and a file named passwords.txt exists.
Attackers use these queries to find password.txt or .env files. If these contain real credentials, the associated accounts (including Facebook accounts or server databases) are instantly compromised.
: If directory browsing is enabled, anyone can view, download, and read the files.
While a robots.txt file will not stop a malicious hacker, it instructs legitimate search engine crawlers not to index sensitive directories. Add disallow rules for your configuration and admin folders to prevent accidental exposure on public search engines. Conclusion
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