Here’s an to the Apple Remote Desktop (ARD) DMG — covering what it is, where to get it, how to install it, and key usage notes.
Modern Mac App Store downloads do not traditionally offer a standalone DMG file. Instead, the installer is embedded within the purchase receipt. However, you can manually create a DMG from the installed application for deployment purposes.
Beware of third-party websites offering a "cracked" or "free" Apple Remote Desktop DMG. Downloading ARD from unauthorized sources exposes your network to malware, keystroke loggers, and compromised certificates. Always obtain the DMG via Apple Business Manager, Apple School Manager, or the official Mac App Store.