  The excess of high energy neutrinos observed by the IceCube collaboration
might originate from baryon number violating decays of heavy shadow baryons
from dark mirror sector which produce shadow neutrinos. These sterile neutrino
species then oscillate into ordinary neutrinos transferring to them specific
features of their spectrum. In particular, this scenario can explain the end of
the spectrum above 2 PeV and the presence of the energy gap between 400 TeV and
1 PeV.
