The Atbroker Registry Change detection rule is designed to identify unauthorized modifications to the registry keys associated with Assistive Technology applications on Windows systems. Specifically, it targets changes within the Accessibility keys located at 'Software\Microsoft\Windows NT\CurrentVersion\Accessibility\ATs' and 'Software\Microsoft\Windows NT\CurrentVersion\Accessibility\Configuration'. The rule flags any creation or modification events that involve the executable 'atbroker.exe' or uninstallers that might be interacting with these registry keys, thereby indicating potential persistence mechanisms employed by attackers or suspicious applications. Key conditions include monitoring for events that contain specific target objects related to the accessibility settings and ensuring that certain filters associated with legitimate operations do not trigger false positives. This approach helps distinguish between benign changes and potentially malicious activity. Given that changes to these registry keys could imply an attempt to maintain stealthy access or to utilize assistive tools for evasion of standard security measures, vigilant monitoring is critical. The rule is particularly relevant given the persistence techniques attackers use to leverage accessibility functions for their benefit.