We propose a novel dark matter (DM) detection strategy for the models withnon-minimal dark sector. The main ingredients in the underlying DM scenario area boosted DM particle and a heavier dark sector state. The relativistic DMimpinged on target material scatters off inelastically to the heavier statewhich subsequently decays into DM along with lighter states including visible(Standard Model) particles. The expected signal event, therefore, accompanies avisible signature by the secondary cascade process associated with a recoilingof the target particle, differing from the typical neutrino signal notinvolving the secondary signature. We then discuss various kinematic featuresfollowed by DM detection prospects at large volume neutrino detectors with amodel framework where a dark gauge boson is the mediator between the StandardModel particles and DM.
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