Introduction Hello everyone and welcome back to the next post in our Detection Engineering series. In the last post, we started getting our feet wet with detection engineering by reading through a Cisco Talos report on Chaos ransomware’s msaRAT and creating a couple Sigma rules from the activity described in the report. We made one rule for the suspicious curl.exe command used to download the malware and another for Chrome or Edge launching in headless mode with the Chrome DevTools Protocol enabled.