B374k.php Patched Jun 2026

Deleting the file erases evidence. The attacker may have placed three other shells ( shell2.php , adminer.php , error_log.jpg ) elsewhere. Instead, rename the file to b374k.php.suspected and change permissions to 000 (no read/write/execute) to neutralize it.

The file’s name is a clue to its nature. While often saved as b374k.php , attackers almost never leave it with that default name. Upon successful installation, they will rename it to something inconspicuous, such as: b374k.php

Modern cloud deployments (Docker, Kubernetes) can mount the PHP application code as read-only. Even if an attacker uploads b374k.php , they cannot write it to disk. Deleting the file erases evidence