Checks BIOS information in registry

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

Executes dropped EXE

Identifies Wine through registry keys

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

Loads dropped DLL

Enumerates connected drives

Attempts to read the root path of hard drives other than the default C: drive.

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