The third photo clearly shows barred antennae suggesting Garrha(genus), There a several quite plain looking Garrha spp. eg. Garrha seritica https://www.inaturalist.org/taxa/1548768-Garrha-sericata
Mmm, I am not 100% sure this is B. eucapnodes https://www.inaturalist.org/observations/115222643 See page 90 of Moths in the ACT. https://www.inaturalist.org/observations?subview=map&taxon_id=700916