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Non-Standard Port - T1571

(ATT&CK® Technique)
Definition

Adversaries may communicate using a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088 or port 587 as opposed to the traditional port 443. Adversaries may make changes to the standard port used by a protocol to bypass filtering or muddle analysis/parsing of network data.
D3FEND Inferred Relationships

Browse the D3FEND knowledge graph by clicking on the nodes below.
        graph LR;

     T1571["Non-Standard Port"] --> |produces| OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"]; class T1571 OffensiveTechniqueNode;
        class OutboundInternetNetworkTraffic ArtifactNode; click OutboundInternetNetworkTraffic href "/dao/artifact/d3f:OutboundInternetNetworkTraffic";
        click T1571 href "/offensive-technique/attack/T1571/"; click OutboundInternetNetworkTraffic href "/dao/artifact/d3f:OutboundInternetNetworkTraffic";             RemoteTerminalSessionDetection["Remote Terminal Session Detection"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          RemoteTerminalSessionDetection["Remote Terminal Session Detection"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class RemoteTerminalSessionDetection DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click RemoteTerminalSessionDetection href "/technique/d3f:RemoteTerminalSessionDetection"; NetworkTrafficSignatureAnalysis["Network Traffic Signature Analysis"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          NetworkTrafficSignatureAnalysis["Network Traffic Signature Analysis"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class NetworkTrafficSignatureAnalysis DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click NetworkTrafficSignatureAnalysis href "/technique/d3f:NetworkTrafficSignatureAnalysis"; Client-serverPayloadProfiling["Client-server Payload Profiling"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          Client-serverPayloadProfiling["Client-server Payload Profiling"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class Client-serverPayloadProfiling DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click Client-serverPayloadProfiling href "/technique/d3f:Client-serverPayloadProfiling"; RelayPatternAnalysis["Relay Pattern Analysis"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          RelayPatternAnalysis["Relay Pattern Analysis"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class RelayPatternAnalysis DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click RelayPatternAnalysis href "/technique/d3f:RelayPatternAnalysis";                     ProtocolMetadataAnomalyDetection["Protocol Metadata Anomaly Detection"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          ProtocolMetadataAnomalyDetection["Protocol Metadata Anomaly Detection"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class ProtocolMetadataAnomalyDetection DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click ProtocolMetadataAnomalyDetection href "/technique/d3f:ProtocolMetadataAnomalyDetection";                               NetworkTrafficCommunityDeviation["Network Traffic Community Deviation"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          NetworkTrafficCommunityDeviation["Network Traffic Community Deviation"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class NetworkTrafficCommunityDeviation DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click NetworkTrafficCommunityDeviation href "/technique/d3f:NetworkTrafficCommunityDeviation";               PerHostDownload-UploadRatioAnalysis["Per Host Download-Upload Ratio Analysis"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          PerHostDownload-UploadRatioAnalysis["Per Host Download-Upload Ratio Analysis"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class PerHostDownload-UploadRatioAnalysis DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click PerHostDownload-UploadRatioAnalysis href "/technique/d3f:PerHostDownload-UploadRatioAnalysis";                          UserGeolocationLogonPatternAnalysis["User Geolocation Logon Pattern Analysis"] -->
          | analyzes | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          UserGeolocationLogonPatternAnalysis["User Geolocation Logon Pattern Analysis"] -.->
            | may-detect | T1571["Non-Standard Port"] ;
          class UserGeolocationLogonPatternAnalysis DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click UserGeolocationLogonPatternAnalysis href "/technique/d3f:UserGeolocationLogonPatternAnalysis";                NetworkTrafficFiltering["Network Traffic Filtering"] -->
          | filters | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          NetworkTrafficFiltering["Network Traffic Filtering"] -.->
            | may-isolate | T1571["Non-Standard Port"] ;
          class NetworkTrafficFiltering DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click NetworkTrafficFiltering href "/technique/d3f:NetworkTrafficFiltering";              OutboundTrafficFiltering["Outbound Traffic Filtering"] -->
          | filters | OutboundInternetNetworkTraffic["Outbound Internet Network Traffic"];

          OutboundTrafficFiltering["Outbound Traffic Filtering"] -.->
            | may-isolate | T1571["Non-Standard Port"] ;
          class OutboundTrafficFiltering DefensiveTechniqueNode;
          class OutboundInternetNetworkTraffic ArtifactNode;
          click OutboundTrafficFiltering href "/technique/d3f:OutboundTrafficFiltering";
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