Techniques › T1132 › AN0304
AN0304 Analytic 0304
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Processes use built-in encoding utilities (e.g.,
base64, xxd, or plutil) to encode file contents followed by HTTP/HTTPS transfer via curl or custom applications.</p>- Detects
- T1132 Data Encoding
- Part of
- DET0108 Detection Strategy for Data Encoding in C2 Channels
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:unifiedlog | base64 or curl processes chained within short execution window | DC0064 Command Execution |
| macos:unifiedlog | HTTP POST with encoded content in user-agent or cookie field | 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 |
|---|---|
EncodedCommandLengthThreshold | Minimum byte size of encoded strings to treat as suspicious |
SuspiciousProcessChainDepth | Number of chained processes within a short window to treat as a correlated behavior |