Php Inline Command Execution — Sigma Rule

Rule metadata and linked tags

Author: Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: medium. Source dates: 2023-01-02 / not supplied.

{
  "category": "process_creation",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 8e9f91352f02b40fafb25c2f925b9523344a80e66a43811a7cff6ad03907597c

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Php Inline Command Execution
id: d81871ef-5738-47ab-9797-7a9c90cd4bfb
status: test
description: Detects execution of php using the "-r" flag. This is could be used as a way to launch a reverse shell or execute live php code.
references:
    - https://www.php.net/manual/en/features.commandline.php
    - https://www.revshells.com/
    - https://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-01-02
tags:
    - attack.execution
    - attack.t1059
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|endswith: '\php.exe'
        - OriginalFileName: 'php.exe'
    selection_cli:
        CommandLine|contains: ' -r'
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://www.php.net/manual/en/features.commandline.php
• https://www.revshells.com/
• https://pentestmonkey.net/cheat-sheet/shells/reverse-shell-cheat-sheet