  In a dedicated run where protons from the Fermilab Booster were delivered
directly to the steel beam dump of the Booster Neutrino Beamline (BNB), the
MiniBooNE detector was used to search for the production of sub-GeV dark matter
particles via vector-boson mediators. The signal searched for was the elastic
scattering of dark matter particles off nucleons in the detector mineral oil,
with neutrinos being an irreducible background. A review of the experiment, its
analysis methods, its results and future perspectives are summarized,
demonstrating that beam dump experiments provide a novel and promising approach
to dark matter searches. This contribution was written for the TAUP 2017
proceedings.
