Techniques › T1689 › AN0997
AN0997 Analytic 0997
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Detection of execution of legacy scripting runtimes (e.g., older versions of Python, Bash, or PowerShell Core) lacking auditing. Monitoring for changes to EFI or system boot files indicative of downgrade-based persistence or bypass of integrity features.</p>
- Detects
- T1689 Downgrade Attack
- Part of
- DET0350 Detecting Downgrade Attacks
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 | Execution of older or non-standard interpreters | DC0032 Process Creation |
| macos:unifiedlog | Modifications or writes to EFI system partition for downgraded bootloaders | DC0034 Process Metadata |
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 |
|---|---|
ApprovedInterpreterVersions | Defines the minimal version of interpreters expected; older versions flagged as downgrade attempts. |