System Integrity Management Platform (SIMP)
github.com
github.com
I'm sure there is some way for them to get through tools like selinux if they encounter it, but for that particular toolkit I'm sure that any potential pitfalls in that respect are far outweighed by the standard criminal hackers or state sponsored attackers, having a harder time breaking your systems.
Besides, I'm sure the cloud and IT security communities have published better stuff elsewhere given the difficulties. If anything, NSA's IT seems behind the times again.