Techniques › T1205 › AN1451
AN1451 Analytic 1451
Network Devices · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Crafted ‘synful knock’ patterns toward routers/switches (same src hits interface/broadcast/network address on same port in short order) followed by ACL/telnet/SSH enablement or module change. Detect device image/ACL updates then a new mgmt session.</p>
- Detects
- T1205 Traffic Signaling
- Part of
- DET0524 Traffic Signaling (Port-knock / magic-packet → firewall or service activation) – T1205
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/ACL/line vty changes, service enable (telnet/ssh/http(s)), module reloads | DC0078 Network Traffic Flow |
| NSM:Flow | Port-knock pattern from one src to device unicast,broadcast,network addresses on same port within TimeWindowKnock | 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 |
|---|---|
MgmtPortSet | Ports whose sudden enablement should alert (23, 22, 2323, 80/443, 4786). |
DeviceRole | Applies different thresholds to core/edge/branch devices. |