Cross-source coverage

T1020.001 / ATT&CK

Automated Exfiltration: Traffic Duplication

1 rule across 1 source.

From MITRE ATT&CK 19.2

Adversaries may leverage traffic mirroring in order to automate data exfiltration over compromised infrastructure. Traffic mirroring is a native feature for some devices, often used for network analysis. For example, devices may be configured to forward network traffic to one or more destinations for analysis by a network analyzer or other monitoring device.

Adversaries may abuse traffic mirroring to mirror or redirect network traffic through other infrastructure they control. Malicious modifications to network devices to enable traffic redirection may be possible through ROMMONkit or Patch System Image.

Many cloud-based environments also support traffic mirroring. For example, AWS Traffic Mirroring, GCP Packet Mirroring, and Azure vTap allow users to define specified instances to collect traffic from and specified targets to send collected traffic to.

Adversaries may use traffic duplication in conjunction with Network Sniffing, Input Capture, or Adversary-in-the-Middle depending on the goals and objectives of the adversary.

Tactics
Exfiltration
Platforms
Network Devices · IaaS
Telemetry
AWS:CloudTrailAWS:VPCFlowLogsnetworkdevice:syslognetworkdevice:Flow

How MITRE says to detect it DET0403

Detection Strategy for Traffic Duplication via Mirroring in IaaS and Network Devices

IaaS Analytic 1131

Configuration changes to virtual TAP/mirror policies that forward traffic to unapproved destinations. Detection correlates management plane API calls with mirrored traffic observation.

  • AWS:CloudTrail CreateTrafficMirrorSession or ModifyTrafficMirrorTarget
  • AWS:VPCFlowLogs Traffic observed on mirror destination instance

Network Devices Analytic 1132

Unauthorized mirroring sessions initiated on routers/switches (e.g., via `monitor session`, `mirror port`) coupled with outbound traffic from mirrored interface to unexpected destinations.

  • networkdevice:syslog Config change: CLI/NETCONF/SNMP – 'monitor session', 'mirror port'
  • networkdevice:Flow Traffic from mirrored interface to mirror target IP

View on attack.mitre.org ↗

splunk/security_content

1 rule
Detection Severity Format
Detect Traffic Mirroring Undefined SPL

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