The senhasegura has two default passwords for versions 3.10 and above, for the SSH endpoint and for the web interface.
In the SSH terminal
User: mt4adm
Password: mt4adm
In the web interface
User: admin
Password: 5enh@5eGuR@!
During deployment, you will be prompted to change the default passwords. Save them because if you lose them, you will need to redeploy the system.