I agree with Steve (good call) as regards Trabala.
It is a female (the males have different markings and are green, at least when alive (many green moths fade to cream over time)).
But the species is tricky...
The non-straight outer edge to the forewing points to T. pallida,
but the brown splotches point to Tt. viridana, ganesha or hantu.
Other characteristics such as the rows of dots and the size of the discal spot also do not fit with any of the specimens on this page of species from Borneo and nearby islands. What we don't know is how variable the species' markings are. Because of that, it may still be one of the above species; but I don't think so.
Trabala species have restricted distributions, at least in Borneo and surrounding areas. So your species from the Indian Himalaya is quite likely to be a different one. I can find only two from India: Tt. vishnu and sulphurea.
Trabala vishnu looks quite similar to yours (see http://ccs-hk.org/DM/butterfly/Lasiocampid/Trabala-vishnou.html). This species has quite a wide distribution (India to Taiwan), so there are likely to be local races with slightly different markings. So I suggest that your specimen is a Himalayan race of Trabala vishnu.