The legitimate way to obtain Mikrotik RouterOS is through the official Mikrotik website. Mikrotik provides:

A cracked version cannot be updated to the latest stable release (e.g., the current Long-term or Stable branches). This leaves your network exposed to known exploits that MikroTik has patched in official releases [1].

: His router was secretly joined to a botnet, using his internet bandwidth to launch attacks on other companies.