Executes dropped EXE

Loads dropped DLL

UPX packed file

Detects executables packed with UPX/modified UPX open source packer.

Enumerates connected drives

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

Maps connected drives based on registry

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

Writes to the Master Boot Record (MBR)

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

AutoIT Executable

AutoIT scripts compiled to PE executables.