Password changed Keychain Uninvited guest

I've been hacked, working with my router all afternoon, at the same time, I had a "guest" without be invited on my computer, which has locked me out of control of password to keychain... also can not delete the guest account.  How can I repair the damage?  With the help of El Capitan on Macbook Pro.

If you do not know the new Keychain password, you will need to create a new one and delete the old. You will not be able to recover passwords.

The guest account will remain if you have FileVault active or Back to My Mac active.

If someone had sufficient access to your Mac to change the Keychain password, you must log on to each of your online accounts and change the password. From another computer, or after you do the following.

A person with access to your computer, you have to assume that everything is compromised. You need to wipe the hard drive completely and reinstall. Restoring a backup made before the intrusion.

Tags: Mac OS & System Software

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