What Is RAT Or Remote Access Trojan ?

Ammyy Admin 3.5 Corporate

Ammyy Admin – a small portable program that lets you quickly and safely receive and provide access to a PC or server through the Internet and remotely manage them in real time. Ammyy Admin allows the user to control the keyboard and mouse, launching applications, sharing files and folders (up to 140Tb), to communicate with a partner with the integrated voice chat, and others. The program does not require reconfiguration of firewalls (Firewall) or VPN connections, port forwarding is not used and does not require the actual IP address
Features

Portability and high speed.
The ability to administer the server.
The presence of the hybrid algorithm kripto operatsii (AES + RSA), which ensures high levels of security and encryption.
Built-in voice chat.
Support HTTPs Proxy.
The ability to share files and folders (up to 140Tb).
The presence of the file manager.
Support for Microsoft Remote Desktop Protocol (RDP).
Setting permissions.

How to crack?