NTA: The Big Step Theory

Let’s come back from the world where the endpoint won the detection and response wars to this one. As we are ramping up our NTA (but, really, broader NDR for network-centric detection and response) research one mystery has to be resolved. What mo… Continue reading NTA: The Big Step Theory

Can I use `lsof` to reliably determine which local process has connected to my open port?

Say I’m running a server application on 127.0.0.1:7646 and a local process (possibly owned by a different user) connects to it, I can run

lsof -Fp -i TCP@127.0.0.1:7646 -i TCP@127.0.0.1:<ClientPort>

which outputs som… Continue reading Can I use `lsof` to reliably determine which local process has connected to my open port?

Can someone tell by looking at USB drive whether those files have been copied to elsewhere from USB or if some files on USB were deleted?

I was wondering if one can find if files were copied from the USB drive to a PC or something, and also if any and which files were recently deleted from the USB.

Continue reading Can someone tell by looking at USB drive whether those files have been copied to elsewhere from USB or if some files on USB were deleted?

Network Anomaly Detection Track Record in Real Life?

As I allude here, my long-held impression is that no true anomaly-based network IDS (NIDS) has ever been successful commercially and/or operationally. There were some bits of success, to be sure (“OMG WE CAN DETECT PORTSCANS!!!”), but in to… Continue reading Network Anomaly Detection Track Record in Real Life?

Detect Elevated Carbon Monoxide (Levels)

The molar mass of carbon monoxide (CO) is 28.0, and the molar mass of air is 28.8, so CO will rise in an ambient atmosphere. It makes sense to detect it farther from the ground, but getting a tall ladder is not convenient and certainly doesn’t make for fast deployment. What do you do if you don’t care for heights and want to know the CO levels in a gymnasium or a tall foyer? Here to save the day, is the Red Balloon Carbon Monoxide Detector.

Circuit.io generates the diagram and code to operate the CO sensor and turn a …read more

Continue reading Detect Elevated Carbon Monoxide (Levels)