Checks BIOS information in registry

BIOS information is often read in order to detect sandboxing environments.

Executes dropped EXE

Loads dropped DLL

Checks installed software on the system

Looks up Uninstall key entries in the registry to enumerate software on the system.

Checks whether UAC is enabled

Writes to the Master Boot Record (MBR)

Bootkits write to the MBR to gain persistence at a level below the operating system.

Suspicious use of NtSetInformationThreadHideFromDebugger