  We propose a minimal extension of the standard model (SM) by including a
scalar triplet with hypercharge 2 and two vector-like leptons: one doublet and
a singlet, to explain simulatenously the non-zero neutrino mass and dark matter
(DM) content of the Universe. The DM emerges out as a mixture of the neutral
component of vector-like lepton doublet and singlet, being odd under a discrete
$Z_2$ symmetry. After electroweak symmetry breaking the triplet scalar gets an
induced vev, which give Majorana masses not only to the light neutrinos but
also to the DM. Due to the Majorana mass of DM, the $Z$ mediated elastic
scattering with nucleon is forbidden. However, the Higgs mediated direct
detection cross-section of the DM gives an excellent opportunity to probe it at
Xenon-1T. The DM can not be detected at collider. However, the charged partner
of the DM (often next-to-lightest stable particle) can give large dispalced
vertex signature at the Large Hadron Collider (LHC).
