Techniques › T1495 › AN0476
AN0476 Analytic 0476
macOS · attack.mitre.org · ATT&CK Enterprise v19.2
<p>EFI updates executed via system processes or binaries outside of expected patch windows or using unsigned firmware packages.</p>
- Detects
- T1495 Firmware Corruption
- Part of
- DET0167 Firmware Modification via Flash Tool or Corrupted Firmware Upload
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 | com.apple.firmwareupdater activity or update-firmware binary invoked | DC0032 Process Creation |
| macos:unifiedlog | boot failure events or SMC validation errors | DC0004 Firmware 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 |
|---|---|
UpdateTimeWindow | Firmware updates usually occur after OS update; out-of-band patterns may indicate compromise |
KEV CVEs whose mapped technique this analytic detects
| CVE | Vendor / product | State |
|---|---|---|
| CVE-2024-54085 | AMI MegaRAC SPx | Mapped |
| CVE-2025-21480 | Qualcomm Multiple Chipsets | Mapped |