The boxes are called "Pall vortex engine air particle separator system"
It's a fancy term to saying to keeps the sand out.
"Super Hind Mk 3 - adds the core avionics systems together with a dual-feed, turreted, 20mm cannon and INGWE anti-tank missiles. The 20mm cannon can be slaved to the crew's helmets.
Planned future upgrades include a redesigned fuselage, digital glass cockpit, infra-red exhaust suppressors, sand filters, composite rotor blades, fixed landing gear and a digital autopilot system. These upgrades will result in the MI-24 Super Agile Hind."