The b374k.php file was a notorious PHP shell, known for its ability to bypass security measures and provide an attacker with complete control over a server. John had heard of it before, but he had never seen it in the wild.

The keyword refers to one of the most well-known and powerful web shells used by cybersecurity researchers, sysadmins, and, unfortunately, malicious actors. It is a PHP-based backdoor script that provides a comprehensive administrative interface for managing a remote server through a web browser. What is b374k.php?