  Since the low mass of $D^*_{s0}(2317)$ has still been a problem to the
conventional quark model, one can consider other options regarding as
multi-quark system. Therefore we investigate the scalar open-charm state
$D^*_{s0}(2317)$ by Thermal QCD Sum Rules (TQCDSR) method using the two-point
correlation function together with contributions of the non-perturbative
condensates up to dimension six. Deriving and numerically analyzing thermal
mass and pole residue sum rules, we accomplish the effects on the properties of
$D^*_{s0}(2317)$ resonance in hot medium. Our numerical evaluations indicate
that the variations in mass and pole residue values are stable through the
growing temperature up to $T\cong100~\mathrm{MeV}$, but they begin to fall
after this point. At critical temperature, the values of mass and pole residue
change up to $91\%, 70\% $ of their values in vacuum in the molecular scenario
and $ 91\%, 69\% $ in the diquark-antidiquark scenario. Our results does not
give any definite information as to whether $D^*_{s0}(2317)$ resonance has
molecular or diquark-antidiquark structure since they are very close to each
other to differentiate them. Besides, we predict the hadronic parameters of the
bottom partner of the $D^*_{s0}(2317)$ resonance in both molecular and
diquark-antidiquark pictures. This bound state is worth investigating in future
experiments. Also the detailed search of hot medium effects on the hadronic
parameters of open-charm meson $D^*_{s0}(2317)$ and the bottom partner could
have some implications to define the QCD phase diagram obtained from heavy-ion
collision experiments. Moreover these results can be useful in distinguishing
conventional quark model mesons from exotica.
