Hi ! I have noticed this bug since last few weeks on mainly window seals. They are in group of 2 to 3 and some if them are found dead. They are Brown in colour and slight shini. Interesting thing about it is when u touch it then it becomes still stand and pulls all legs in as there is only brown dot.
I have uploaded pictures but not sure if it can be identify through it. This is very small, hardly 1 to 2 mm in size.
Maybe a tobacco beetle, but really can't give a good ID from your photos (I know the small size makes it difficult). But you can see the real thing. So have a look at the beetles here, and you may find a match