Techniques › T1571 › AN0634
AN0634 Analytic 0634
Linux · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Unusual daemons or user processes binding/listening on ports outside of standard ranges, or initiating client connections using mismatched protocol/port pairings.</p>
- Detects
- T1571 Non-Standard Port
- Part of
- DET0227 Detection Strategy for Non-Standard Ports
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 |
|---|---|---|
| auditd:SYSCALL | socket/connect syscalls | DC0078 Network Traffic Flow |
| linux:syslog | processes binding to non-standard ports or sshd configured on unexpected port | DC0038 Application Log Content |
| linux:osquery | process listening or connecting on non-standard ports | DC0032 Process 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 |
|---|---|
AllowedServices | Exclude ports intentionally configured for enterprise apps. |
PayloadEntropyThreshold | Define thresholds for anomalous payload entropy to catch tunneled traffic. |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2023-38035 | Ivanti Sentry | Mapped |