  Vector boson dark matter (DM) appears in $SU(2)_N$ extension ($N$ stands for
neutral) of Standard Model (SM) where an additional global $U(1)_P$ symmetry is
assumed and results in a generalized lepton number defined as: $L=P+T_{3N}$.
Breaking of $U(1)_P$ leads to the breaking of $L$ to $(-1)^L$, thus stabilizing
DM through modified $R=(-1)^{3B+L+2J}$. This model, already discussed in
literature, offers several novel features to elaborate upon. For example,
$t$-channel annihilation and dominant $s$-channel direct search, along with
co-annihilation, helps the DM to evade stringent direct search bounds from LUX
and XENON1T after satisfying relic density constraints. On the other hand, the
exotic particles of the model can be produced at the Large Hadron Collider
(LHC) yielding multilepton final states. Hadronically quiet four lepton signal
with large missing energy, in specific, is shown to provide a smoking gun
signature of such a framework. We study the details of $E(6) \to SM \otimes
SU(2)_N$ breaking patterns (through D-parity odd/even cases) which yield
important phenomenological consequences.
