Techniques › T1568.003 › AN0728
AN0728 Analytic 0728
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Monitor DNS query results where subsequent connections use derived or unusual port numbers not explicitly resolved, especially when tied to suspicious processes. Correlate Sysmon DNS logs (Event ID 22) with process creation and socket activity.</p>
- Detects
- T1568.003 DNS Calculation
- Part of
- DET0262 Detection Strategy for Dynamic Resolution through DNS Calculation
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 |
|---|---|---|
| WinEventLog:Sysmon | EventCode=3, 22 | DC0082 Network Connection Creation |
| WinEventLog:Sysmon | EventCode=1 | 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 |
|---|---|
PortDeviationThreshold | Deviation from common service ports (e.g., >1024 when DNS resolved service expects 80/443) |
TimeWindow | Correlation window between DNS response and network connection (e.g., 5 minutes) |