We use QCD sum rules to study the possible existence of a$D_sar{D}^*- D_s^*ar{D}$ molecule with the quantum number$J^{PC}=1^{++}$. We consider the contributions of condensates up todimension eight and work at leading order in $alpha_s$. We obtain$m_{D_sD^*}=(3.96~pm~0.10)$~GeV around 100 MeV above the mass ofthe meson $X(3872)$. The proposed state is a natural generalizedstate to the strangeness sector of the $X(3872)$, which was alsofound to be consistent with a multiquark state from a previous QCDsum rule analysis.

Keywords: Exotics, heavy quarkonium