If an intrusion is underway, you can’t wait. Common Defense responds now, with red-team intuition and a tested playbook to contain, eradicate, and recover, then harden so it can’t happen twice.
The first hour decides the outcome
An intrusion spreads while you decide who to call. We move first to contain it: cut the attacker’s access and stop the spread. Then we establish how they got in and how far they reached, so your decisions rest on facts instead of guesses.
Then we close the door
Restoring systems is the easy part. You also get a clear root-cause account and the evidence your customers, regulators, and board will need. We harden the path the attacker used, so the same door won’t open twice. We stay until the gap is closed.
Before we’re on the call
The instinct to wipe and rebuild destroys the evidence you’ll need later. In the first minutes, preserve what you can and slow the spread. Isolate the affected systems. Revoke the sessions you know are compromised. Freeze new deployments. Hold off on paying anyone or posting publicly until the scope is clear. Then get us on the line.
Who we respond for
The companies we defend have more than customer data at risk: source code, signing keys, model weights, and treasuries. The paths to them run through identity, pipelines, and cloud. Generic IR firms are built for the enterprise data breach. We respond to the incidents that hit crypto, AI, and fintech teams, where a single compromise can be irreversible. That is the difference between getting back online and getting the whole story: what the attacker took, how they moved, and what it means for the people who depend on you.
Common Defense helped protect us during a severe incident, diagnosed the root cause rapidly, and set up systems in place to prevent future attacks and reassure our stakeholders. — CEO, multi-billion protocol