Malicious cyber activities against space activities (MCASAs) add to the complexities of the legal attribution of malicious cyber activities violating international law. The ‘space’ implies the possibility of applying international space law considering the lex specialis derogat legi generali (more specific rules will prevail over more general rules) principle. However, neither the attribution rules of international space law nor of general international law could completely tackle this dilemma. This study categorizes MCASAs into three categories based on the role of the involved space activities and analyses the crux of legal attribution in each scenario. It proposes different coping approaches, including a four-pronged way, introducing a peculiarity test, and specifying substantive international obligations of the states responsible for space activities.
