UAC Bypass Using ChangePK and SLUI

Detects a specific User Account Control (UAC) bypass technique that leverages the 'changepk.exe' and 'slui.exe' executables. This method is associated with UACMe bypass technique #61, where 'slui.exe' is used as a parent process to launch 'changepk.exe' with elevated privileges, bypassing the UAC prompt. The rule specifically looks for 'changepk.exe' being spawned by 'slui.exe' with an integrity level of 'High' or 'System'.