If you mean to “scoop them up” as a means of attack… there are thousands of them already, they’re all over the globe, with plans to go up to 40k. They do have engines, and while not particularly powerful (hall effect ion thrusters), they could try to counter the attack by trying to deorbit, along with the attacking satellite. My guess is it would be too slow and ineffective.
The best physical attack would be to cause a collision cascade at their orbital height… or set off a nuke in orbit and EMP them by the hundreds, but that would also EMP a bunch of other satellites, mess up the Van Allen belts, hit anything in a wide area on the ground, and breach several international treaties.