Techniques › T1090.003 › AN1024
AN1024 Analytic 1024
Network Devices · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Encrypted traffic or ICMP tunneling from border routers to internal routers or unknown external IPs. Forwarded traffic shows consistent hop-to-hop relaying without matching configured VPN or expected network topology.</p>
- Detects
- T1090.003 Multi-hop Proxy
- Part of
- DET0359 Multi-hop Proxy Behavior via Relay Node Chaining, Onion Routing, and Network Tunneling
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 |
|---|---|---|
| NSM:Flow | Relayed session pathing (multi-hop) | DC0078 Network Traffic Flow |
| NSM:Firewall | Outbound encrypted traffic | DC0085 Network Traffic Content |
| networkdevice:syslog | Custom firmware or routing changes | DC0004 Firmware Modification |
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 |
|---|---|
VPNConfigWhitelist | Define allowed internal router communication paths. |
ICMPPayloadEntropy | High entropy ICMP payloads may indicate tunneling activity. |
RelayChainSignature | Track known multi-hop pattern signatures or port hopping techniques. |