Attacks through permitted tools
Devices left the company network, and not everywhere was securing them thought through first. Most attacks now use techniques like lateral movement and island hopping: they do damage through tools that are already permitted on the machine. A scanner comparing files against a list sees none of it.
What these products do differently
CrowdStrike Falcon and Microsoft Defender read system events to learn what normal activity looks like in an estate. What stands out is then a sequence that does not fit, such as an Office document starting PowerShell.
Much of the value is in the recording. After an incident you can use it to reconstruct what happened.
Halcyon stands beside them and fights ransomware alone. It adds the layer that intercepts encryption and takes the leverage out of extortion.
Licensing and responsibility
Which of the two EDR products fits is usually settled by existing licensing. EDR needs a team assigned to it.


