Demonstrating the transition from theorized space cyber attacks to practical proof of concepts. The presentation will utilize a simple yet effective attack, a man-in-the-middle attack, on the ground infrastructure to demonstrate how many SPARTA techniques and sub-techniques can be performed against a spacecraft from the ground infrastructure. By illustrating the significant impact of this simplified concept, we aim to emphasize the urgent need for enhanced cybersecurity measures throughout the entire lifecycle of space missions and break the inherit trust between the ground and spacecraft.