Techniques › T1560.003 › AN1215
AN1215 Analytic 1215
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detects custom archiving by monitoring execution of Swift/Objective-C apps or scripts producing high-entropy files with non-standard headers. Correlates unified logs of abnormal NSFileHandle/NSData operations, memory use of XOR/bitwise operations, and file creation events.</p>
- Detects
- T1560.003 Archive via Custom Method
- Part of
- DET0438 Detect Archiving via Custom Method (T1560.003)
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 | Suspicious Swift/Objective-C or scripting processes writing archive-like outputs | DC0032 Process Creation |
| macos:unifiedlog | Creation of files with anomalous headers and entropy values | DC0039 File Creation |
| macos:unifiedlog | Abnormal memory operations (XOR/bitwise loops) during archive generation | DC0020 Process Modification |
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 |
|---|---|
UserContext | Flag if archiving occurs under privileged/system accounts. |
EntropyThreshold | Entropy score cutoff for identifying custom compressed or encrypted files. |
AllowedApps | Applications legitimately using custom archiving for business purposes. |