  We present a theoretical model of multimode quantum correlations in bright
frequency combs generated in continuous-wave regime by microresonators above
threshold. Our analysis shows how these correlations emerge from cascading
four-wave mixing processes fed by the input pump as well as the generated
bright beams. Logarithmic negativity criterion is employed to quantify
entanglement between partitions of modes, demonstrating the transition from a
bipartite regime just above the oscillation threshold to the multipartite one
at higher input pump powers. Due to its generality, our model can be safely
used to describe other kinds of non-linear $\chi$ (3) cavities.
