Techniques › T1048.001 › AN1389
AN1389 Analytic 1389
Windows · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects the execution of non-browser processes establishing outbound encrypted network connections using uncommon symmetric encryption protocols (e.g., AES via PowerShell or custom scripts) to alternate external destinations.</p>
- Detects
- T1048.001 Exfiltration Over Symmetric Encrypted Non-C2 Protocol
- Part of
- DET0503 Behavioral Detection Strategy for Exfiltration Over Symmetric Encrypted Non-C2 Protocol
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 |
|---|---|
PayloadEntropyThreshold | Flag high-entropy payloads sent over unexpected protocols. |
TimeWindow | Define allowable transfer window (e.g., abnormal traffic outside business hours). |
ExecutableAllowlist | List of known-good binaries for encrypted traffic (e.g., Chrome, Outlook). |