This is a SCADA security hardening guide for Siemens Simatic WinCC version 7.x.
You can download it from the following link: https://packetstormsecurity.com/files/download/119725/pt-scada-wincc-compliance-eng-beta-122012-121227045444-phpapp01.pdf
Source: https://packetstormsecurity.com/files/119725/Siemens-Simatic-WinCC-7.x-Hardening-Guide.html