Using assert() to Execute Malware in PHP 7 Environments

Initially released December 2015, PHP 7 introduced a multitude of performance and security improvements. Approximately 43.7% of websites across the web currently use PHP 7.x, making it an incredibly popular scripting language — which is likely why attackers are creating malware to target environments which leverage it.

During a recent investigation, our team stumbled across some malicious code which is used to inject a .user.ini file into a PHP 7 environment and add zend.assertions = 1.

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