System Monitor (Sysmon) is a Windows system service and device driver that, once installed on a system, remains resident across system reboots to monitor and log system activity to the Windows event log. It provides detailed information about process creations, network connections, and changes to file creation time. By collecting the events it generates using Windows Event Collection or SIEM agents and subsequently analyzing them, you can identify malicious or anomalous activity and understand how intruders and malware operate on your network.
Josh Brower wrote a great paper on integrating sysmon into Security Onion:
SwiftOnSecurity has a great sysmon config file to use as a starting point:
Download sysmon here:
Download SwiftOnSecurity’s example sysmon config here:
For more information about sysmon, please see https://technet.microsoft.com/en-us/sysinternals/sysmon.
Also see “How to Go from Responding to Hunting with Sysinternals Sysmon”:
TrustedSec has a great Community Guide on Sysmon: