Techniques › T1132.002 › AN0929
AN0929 Analytic 0929
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>EndpointSecurity/Unified Logs show processes generating custom alphabets or long high-entropy, non-standard tokens → network logs (PF/Zeek/EDR) show asymmetric beacons, protocol mismatches, or periodic fixed-size posts.</p>
- Detects
- T1132.002 Non-Standard Encoding
- Part of
- DET0326 Behavior-chain detection for T1132.002 Data Encoding: Non-Standard Encoding across Windows, Linux, macOS, ESXi
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 |
|---|---|---|
| macos:endpointsecurity | ES_EVENT_TYPE_NOTIFY_EXEC: arguments contain long, non-standard tokens / custom alphabets | DC0032 Process Creation |
| PF:Logs | high out:in ratio or fixed-size periodic flows | DC0078 Network Traffic Flow |
| NSM:Flow | http: suspicious long tokens with custom alphabets in body/headers | 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 |
|---|---|
EntropyThreshold | Payload entropy minimum. |
TokenLengthThreshold | Minimum suspicious token length. |
BytesOutToInRatio | Asymmetry threshold. |
TimeWindow | Correlation window. |
AllowedSignedBinaries | Signed binaries that legitimately implement custom encoders. |