A threat actor breached a Jenkins server through its unauthenticated Script Console, then installed a self-healing SSH backdoor: delete the key and a systemd timer disguised as an update checker puts it back within five minutes. They stole the keys that decrypt the entire Jenkins credential store, harvested AWS credentials, and two days later deployed a cryptominer throttled to avoid detection. Full kill chain, IOCs, and Sigma detection rules inside.
Docker exposes a management interface, the Docker daemon API, that lets you create, start, and control containers. When it is accidentally published to the internet with no authentication, anyone who can reach that port can take over the host underneath it. We watched a fully automated toolkit do exactly that in about 45 seconds.
