Techniques › T1020.001 › AN1132
AN1132 Analytic 1132
Network Devices · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Unauthorized mirroring sessions initiated on routers/switches (e.g., via
monitor session, mirror port) coupled with outbound traffic from mirrored interface to unexpected destinations.</p>- Detects
- T1020.001 Traffic Duplication
- Part of
- DET0403 Detection Strategy for Traffic Duplication via Mirroring in IaaS and Network Devices
Log sources and channels
Exactly as MITRE states them in x_mitre_log_source_references. Where a channel is vague, it is vague in the source; kevmap does not tidy it.
| Log source | Channel | Data component |
|---|---|---|
| networkdevice:syslog | Config change: CLI/NETCONF/SNMP – 'monitor session', 'mirror port' | DC0078 Network Traffic Flow |
| networkdevice:Flow | Traffic from mirrored interface to mirror target IP | DC0082 Network Connection Creation |
Mutable elements
Parameters MITRE marks as environment-specific. These are the knobs you are expected to tune; they are why an analytic is not a rule.
| Field | Description |
|---|---|
ConfigChangeType | Tune based on accepted interface config changes (e.g., audit only mirror session creation) |
MirrorDestinationPort | Define high-risk ports used for exfil (e.g., 4443, 8443, 2055) |
DeviceRole | Define whether mirroring is expected on edge vs core vs distribution devices |