Please help to identify the following description belonging to which technique in MITRE and the corresponding tactics: DarkGate overrides the <code>%windir%</code> environment variable by setting a Registry key, <code>HKEY_CURRENT_User\Environment\windir</code>, to an alternate command to execute a malicious AutoIt script. This allows DarkGate to run every time the scheduled task <code>DiskCleanup</code> is executed as this uses the path value <code>%windir%\system32\cleanmgr.exe</code> for execution.