A process by which a symbiont alters ubiquitin-like protein modification of target proteins of either host or symbiont proteins. This includes ubiquitination, SUMOylation, NEDDylation, and ISG15ylation. The ubiquitination status of a protein  affects whether it is targeted to the proteasome for degradation. The host is defined as the larger of the organisms involved in a symbiotic interaction.
modulation of host ubiquitin pathway by virus