GitHub - micahflee/php_backdoor_scanner: A simple script that scans a webserver for suspicious looking php files
PHP Backdoor Malware in WordPress Theme Files · Quttera web security blog
Fixing PHP Pharma Hack - Viagra & Cialis SEO Spam in PHP
GitHub - djeraseit/PHP-backdoor-detector: PHP backdoor detector is a Python toolkit that helps you find malicious hidden suspicious PHP scripts and shells in your site files.
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Bantam - A PHP Backdoor Management And Generation tool/C2 Featuring End To End Encrypted Payload Streaming Designed To Bypass WAF, IDS, SIEM Systems
Finding PHP and WordPress Backdoors using antivirus and Indicator of Compromise - WPSec
Evaluating Cookies to Hide Backdoors - Security Boulevard
Detecting & Removing PHP Backdoors From the Website