Cyber security in many ways can be readily characterized as cyber warfare. Taking this perspective, how do we prepare for battle and how can organizations survive APT attacks? The answers can be found when we learn lessons from history and glean knowledge from each other, so let’s tell war stories. Since early 2018, APT Leviathan (Fever Dream, TEMP.Periscope) has been conducting an ongoing wave of intrusions targeting engineering and maritime entities. This tale from the CSOC chronicles one such attack encounter. From the APT side of the story, we will explore how they achieved shell, conducted recon, gathered creds, moved laterally, established persistence and engaged their core target. From the CSOC side of the story, we will review how they were detected, pursued, and defeated in the last second cut-the-red-wire-before-detonation dramatic ending. We’ll conclude with lessons learned and recommendations.