If you suspect your router has been compromised or was running a "crack," use the Netinstall tool to wipe it and perform a fresh, clean installation. Secure Your Admin Access: Change the default admin username. Use a strong, unique password.
Only download RouterOS packages directly from the MikroTik Download Page . huntertik-for-mikrotik-6-Archives---Crack-Pro-PC
Most "cracks" for MikroTik RouterOS (especially older v6 versions) include hidden scripts. These can allow attackers to monitor your traffic, steal passwords, or use your router for DDoS attacks . If you suspect your router has been compromised