MoonBounce (APT41)
Attributions are based on open-source threat reports. A family appearing here means at least one syscall record cites it; absence does not imply non-use.
7 syscalls cited
- NtAddDriverEntry
Registers a new EFI_DRIVER_ENTRY in the firmware so the UEFI environment loads a driver before the OS.
- NtModifyDriverEntry
Overwrites an existing EFI_DRIVER_ENTRY identified by its ID, rewriting the UEFI Driver#### NVRAM variable in place.
- NtDeleteDriverEntry
Removes a registered EFI_DRIVER_ENTRY by ID, deleting the corresponding UEFI Driver#### NVRAM variable.
- NtEnumerateDriverEntries
Returns a packed list of every registered EFI_DRIVER_ENTRY — the UEFI Driver#### variables dispatched before the boot manager.
- NtSetDriverEntryOrder
Rewrites the platform's UEFI DriverOrder list, controlling which UEFI drivers load first at boot.
- NtQuerySystemEnvironmentValueEx
Reads a UEFI variable identified by a (name, vendor GUID) pair and returns its data plus attributes.
- NtSetSystemEnvironmentValueEx
Writes or deletes a UEFI variable identified by (name, vendor GUID) — the canonical firmware-persistence surface.