1200KM / detection
Detection workspace for T1133 External Remote Services: 19 Sigma sources, 1 Atlas concepts and 1 anomaly models. No live detection validation.
MATCH(successful_remote_access) AND source_ip NOT_IN approved_networks -> ALERTComparison unit: user-device-service relationship.
Expected behavior: remote access follows established source, device, and destination relationships.
Deviation: a new edge, unusual session duration, or access outside the entity's temporal context.
Unusual or unauthorized external remote access attempts (e.g., RDP, VPN, Citrix) → repeated failed logins followed by a successful session from uncommon geolocations or outside business hours → subsequent internal lateral movement or data exfiltration activities.
Repeated SSH, VPN, or RDP gateway authentication attempts from external IPs → subsequent successful logon → remote shell or lateral movement activity (e.g., scp/sftp).
Unexpected inbound or outbound VNC/SSH/Screen Sharing connections from external sources → repeated failed logins followed by success → remote interactive sessions or abnormal file transfers.
Connections to exposed container services (e.g., Docker API, Kubernetes API server) from unauthorized external IPs → abnormal container creation/start → lateral activity within cluster nodes.
No reviewed association in this snapshot.
These are explicit actor-to-technique associations in the existing Threat Matrix snapshot, not attribution of an event or proof that a detector identifies the actor. No tool-to-actor relationship is inferred.
Curated research views reached through an exact source technique, a catalog model, or a reviewed collection reference. These are navigation associations, not claims of detector effectiveness or sensor equivalence.
Telemetry contracts · Maintained query examples · Validation and blind spots
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.