Alien probe appears in front of Dimorphos moments before impact DART spacecraft?

Moments before NASA's DART spacecraft hit asteroid Dimorphos the live footage shows an unknown black object that appears in front of the asteroid making some strange movements. 


The footage shows the object changing direction several times before disappearing. 

Could it be space debris flying next to the asteroid Dimorphos or it may be an alien object under intelligent control monitoring the DART mission and the results of the impact?