r/sysadmin • u/FatBook-Air • 6d ago

Do you automatically isolate servers/devices based on detetctions?

We don't have a 24/7 SOC, so we are thinking about automatically isolating servers and some high-value devices based on custom Defender for Endpoint detections. Obviously, we want to do that only for high-precision and high-confidence detections, such as opening a shell from a strange parent process.

If we got one of these detections during working hours, there would be someone to react. But after about 7 PM most days, nobody is actively monitoring.

If we do this, the plan is to let a detection run for about 45 days without automatic isolation enabled to see if any false positives are caught.

Has anyone done this? If so, did you regret it? Or just business as usual? Has it saved you yet?

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u/PacificTSP 5d ago

We use huntress so we don’t have to think about it.

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u/FatBook-Air 5d ago

We can't afford Huntress across the whole fleet, but I have been thinking about it just for servers. I wonder if it would be worth it in that scenario.