I really think it might be a Euceraphis betulae (European Birch Aphid) because both there is a very similar sighting on iNat at https://inaturalist.ala.org.au/observations/186371818 and because I have a birch tree about 5 meters from where I set up my light at night.
I am leaning towards thinking you are right but pigmentation of legs seems to pale seehttps://influentialpoints.com/Gallery/Euceraphis_betulae_Silver_birch_aphid.htm