  eROSITA (extended ROentgen Survey with an Imaging Telescope Array) instrument
onboard the Russian-German `Spectrum-Roentgen-Gamma' (SRG) mission observed the
Her X-1/HZ Her binary system in multiple scans over the source during the first
and second SRG all-sky surveys. Both observations occurred during a low state
of the X-ray source when the outer parts of the accretion disk blocked the
neutron star from view. The orbital modulation of the X-ray flux was detected
during the low states. We argue that the detected X-ray radiation results from
scattering of the emission of the central source by three distinct regions: (a)
an optically thin hot corona with temperature $\sim (2-4) \times 10^6$ K above
the irradiated hemisphere of the optical star; (b) an optically thin hot halo
above the accretion disk; and (c) the optically thick cold atmosphere of the
optical star. The latter region effectively scatters photons with energies
above $5-6$ keV.
