Techniques › T1542 › AN0777
AN0777 Analytic 0777
Network Devices · attack.mitre.org · ATT&CK Enterprise v19.2
<p>Unexpected firmware image uploads via TFTP/FTP/SCP. Configuration changes modifying boot image pointers. Logs showing boot variable redirection to non-standard images. Anomalous reboots immediately following firmware changes not tied to patch schedules.</p>
- Detects
- T1542 Pre-OS Boot
- Part of
- DET0278 Detection Strategy for T1542 Pre-OS Boot
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 |
|---|---|---|
| networkdevice:config | Boot variable modified to point to non-standard or unsigned image | DC0004 Firmware Modification |
| networkdevice:firmware | Unexpected firmware image upload events via TFTP/FTP/SCP | DC0046 Drive 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 |
|---|---|
ApprovedFirmwareHashes | Known good firmware image hashes allowed for boot. |
MaintenanceWindows | Timeframes during which firmware updates are expected. |