Executes dropped EXE

Loads dropped DLL

Registers COM server for autorun

UPX packed file

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

Adds Run key to start application

Enumerates connected drives

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

Installs/modifies Browser Helper Object

BHOs are DLL modules which act as plugins for Internet Explorer.