In theory, the CCD-noise layer, applied with the “difference” layer-mode should do the trick.
Especially on a frame with such a dark background.
Alternatively the trick I use in Photoshop to get rid of static CCD noise is this:
– duplicate your main image, do a median high enough, so the noise is gone, don’t worry about the loss of detail. (you can do that with a precomp in AE)
– Do a channel-mixer on your CCD-noise-layer: monochrome, and with R,G & B all set to 100%
– Use that Greyscale image as the Mask (Luma Matte) to your Median Layer.
– Fine tune the levels of your mask.
Now you’re doing a median, only where there’s static CCD noise.