Techniques › T1542 › T1542.002
T1542.002 Component Firmware
stealth · persistence — Windows, Linux, macOS · attack.mitre.org · JSON
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MITRE detection strategy
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analytics
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Sigma rules tagged attack.t1542.002
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KEV CVEs mapped here
<p>Adversaries may modify component firmware to persist on systems. Some adversaries may employ sophisticated means to compromise computer components and install malicious firmware that will execute adversary code outside of the operating system and main system firmware or BIOS. This technique may be similar to System Firmware but conducted upon other system components/devices that may not have the same capability or level of integrity checking.</p><p>Malicious component firmware could provide both a persistent level of access to systems despite potential typical failures to maintain access and hard disk re-images, as well as a way to evade host software-based defenses and integrity checks.</p>
KEV CVEs mapped to this technique · CTID Mappings Explorer
None. No KEV entry in the public mapping names this technique. Given that 74.7% of KEV has no mapping at all, this says more about the mapping than about the technique.
Detection strategy · ATT&CK Enterprise v19.2
- DET0323 Detection Strategy for T1542.002 Pre-OS Boot: Component Firmware v1.0
AN0916 WindowsDetection of anomalous driver and firmware interactions, including unsigned or unexpected firmware updates, driver loads linked to hardware components, and suspicious use of privileged APIs to read/write firmware or controller memory.firmware:integrity
Firmware integrity verification failures or mismatches against expected UEFI/firmware image baselines→ DC0004 Firmware ModificationTunable:KnownGoodFirmwareHashesDriverAllowListTimeWindowAN0917 LinuxDetection of suspicious use of ioctl/sysfs calls to access device firmware, unexpected flashing tools execution, and anomalous firmware checksums logged by SMART or kernel audit mechanisms.auditd:SYSCALLioctl/write: Direct firmware update or device memory manipulation syscalls→ DC0004 Firmware ModificationTunable:FirmwareImageBaselineAlertThresholdsAN0918 macOSDetection of EFI/firmware manipulation attempts via abnormal driver loads, unsigned kexts, or tampered NVRAM variables associated with component firmware configuration.macos:unifiedlogFirmware update events or kernel extension (kext) loads not signed by Apple→ DC0004 Firmware ModificationTunable:ApprovedKextListEFIHashBaseline
Sigma rules · SigmaHQ da9bb07d64, tag attack.t1542.002
No Sigma rule carries this tag. MITRE publishes a detection strategy above, so the behaviour is specified; what is missing is public detection content.