Writing detections when stuck with EDR
Introduction Making the leap to purchasing and maintaining an EDR solution can be huge for organisations so huge in fact that they never really progress from there when it comes to visibility on assets. This is an important consideration because organisations should aim to achieve some level of detection engineering but will likely never get to explore the associated complexities. So how can organisations effectively and easily write detections that actually help to protect them when they are only able to leverage an EDR tool. Understanding your tools limitations To most people EDR tools are incredibly verbose in the telemetry they capture from any given asset but unfortunately relative to overall telemetry available they actually only capture what the vendors think is the most pertinent. This is for obvious reasons because ingesting telemetry at the scale vendors do comes at a significant cost so they implement "cost-saving measures" like limiting the amount of any one given