This issue of the Rapid7 Quarterly Threat Report takes a deep dive into the threat landscape for 2018 Q4 and looks more broadly at 2018 as a whole. We provide an assessment of threat events by organization size and industry, and examine threat incident patterns identified through guidance from security specialists. We also further explore inbound activity to our honeypot network to identify trends and patterns that reveal rising new threats, such as Android Debug Bridge (ADB) activity, the persistence of old threats such as EternalBlue, and the vulnerability posed by non-novel credentials as revealed to publicly exposed systems. The report concludes with five steps you can take to bolster your organization’s security posture in 2019 and beyond, based on our findings.