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PHP Worker Executing Shell Redirection Payload (PHP2Shell Constrained Execution)

Detects PHP worker processes (php-fpm, apache2, httpd) executing shell interpreters with input or output redirection syntax (e.g., sh</tmp/*, sh</dev/shm/*, sh<*). This pattern indicates exploit payloads operating…

Description

Detects PHP worker processes (php-fpm, apache2, httpd) executing shell interpreters with input or output redirection syntax (e.g., sh</tmp/*, sh</dev/shm/*, sh<*). This pattern indicates exploit payloads operating under strict inline memory string constraints, such as the 14-byte zend_string carrier limit in php2shell (CVE-2026-109618 / CVE-2026-109619).

Detection logic

Detection requirements

Platform
ContainersESXiIaaSLinuxmacOSNetwork DevicesWindows

The rule states no platform. This is derived from the 0 ATT&CK techniques it maps to.

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