Techniques › T1573.002 › AN1500
AN1500 Analytic 1500
Network Devices · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Encrypted sessions detected with asymmetric key exchange anomalies on non-standard ports or with invalid/malformed certs. Defender correlates NetFlow/IPFIX with IDS/IPS detecting RSA exchanges outside expected TLS flows.</p>
- Detects
- T1573.002 Asymmetric Cryptography
- Part of
- DET0543 Detection Strategy for Encrypted Channel via Asymmetric Cryptography across OS Platforms
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 | Flow records with RSA key exchange on unexpected port | DC0078 Network Traffic Flow |
| IDS:TLSInspection | Malformed certs, incomplete asymmetric handshakes, or invalid CAs | DC0085 Network Traffic Content |
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 |
|---|---|
PortProfiles | Define expected ports for asymmetric cryptography (e.g., 443, 993). |
CertValidationPolicy | Thresholds for rejecting untrusted/self-signed certs. |