Suspicious Marimo Terminal WebSocket RCE Access via Webserver
- Category
- webserver
- Author
- HuntRule
- Published
- 2026-05-20
- Updated
- 2026-08-28
ATT&CK techniques
Initial AccessRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects access to the marimo terminal WebSocket endpoint that an attacker abused for remote code execution as the initial pivot in an LLM-guided intrusion toward an internal database. The endpoint exposes an interactive shell over the notebook interface. Requests to this path from untrusted sources indicate attempted exploitation of the exposed marimo service.
Reporting behind it
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
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