Quadrasura is a genus of moth in the family Arctiidae which was erected in 2001. The only species in the genus Quadrasura ktimuna was formerly placed in the genus Asura. The species is found in Borneo. The species is only known from the two original specimens from Kalimantan. The type locality is Smitau, inland from Singkawang which is on the coast of western Kalimantan north of Pontianak.