The site (mcleaks) allows players to log onto the offline, non-authenticated Minecraft server address "mcleaks.net", which then provides the user with a premium Minecraft account. They do this by tunneling the user to other Minecraft servers with the account authentication.

Is Mcleaks illegal?

No Mcleaks is neither legal nor safe. Using an account that has not been created by you or your parent (child account provision) is against Microsoft's TOC and hence can be banned. Using such accounts on consoles can lead to a console ban too.

Can you trust MC leaks?

MCleaks is a legit website, I've used it so much, I haven't got a virus or anything! From time to time the website has to restock and so you can't get an account, but while it is up, its amazing!