In March 2021, I uncovered the first known malware targeting Windows containers, a development that is not surprising given the massive surge in cloud adoption over the past few years. I named the malware Siloscape (sounds like silo escape) because its primary goal is to escape the container, and in Windows this is implemented mainly by a server silo.
Siloscape is heavily obfuscated malware targeting Kubernetes clusters through Windows containers. Its main purpose is to open a backdoor into poorly configured Kubernetes clusters in order to run malicious containers.
Compromising an entire cluster is much more severe than compromising an individual container, as a cluster could run multiple cloud applications whereas an individual container usually runs a single cloud application.
Source: Palo Alto