  The recently observed Higgs like resonance at 125 GeV shows an enhanced rate
in the diphoton channel, while being roughly consistent with the standard model
expectation for the $WW^*$ and $ZZ^*$ channels. Such an enhancement is possible
due to anomalous gauge boson couplings. We explore this feature within a
minimal extension of the standard model, where a singlet scalar is introduced
which also plays the role of the dark matter candidate. It is argued that such
a minimal scenario, without new charged particles, can in principle lead to the
desired enhancement of the diphoton rate via the induced anomalous gauge
couplings, and at the same time improve the stability of the electroweak
vacuum.
