Here's the most minimal things you need to have to run a strong security program. You can use this tool to evaluate your current posture, find missing fundamentals. This program can also be used to simplify a setup that has grown too complex, or build a foundation from scratch.

Start by minimizing the attack surface. Keep a full asset inventory, remove anything unnecessary, and harden what remains. The less there is to attack, the less you have to defend.

Identity and access management comes next. Default to no access and grant it only when needed and only in the amount needed, lock down admin accounts, and enforce zero trust with network segmentation. Trust nothing by default. Least privilege limits the damage any single compromise can cause.

Next comes data security, which is usually the real target, so it needs protection that fits that role. Classify sensitive data, encrypt it, and control who can reach it. Make sure backups are tested, protected, and actually restorable when you need them. Keep them off-site and immutable.

Then patch and vulnerability management. Both need to run constantly, with scans that run often, patches that are applied fast, and always focusing on eliminating unsupported software, since known bugs give attackers easy wins you can avoid simply by staying current.

Incident response closes the operational side, with a minset that attacks will happen so assuming breach is the right approach. Keep the plan simple and practice it, and make sure the team knows how to detect, contain, and recover. Preparation is key and beats scrambling during an incident.

This whole approach depends on continuous assessment. Scan, test, clean up, and recheck on a regular schedule, remove what's no longer needed, and keep adapting, since security works as an ongoing process rather than something you finish once and leave alone. Strip the systems down, lock down what remains, test often, and trust nothing.

That's the Brutalist approach: simple, strong, and built to survive contact with reality.