Multiple logon failures Advapi Logon type 5

Posted on 2010-09-08
Last Modified: 2012-05-10
Hello,  I have logon failures every minute in event viewer.  Logon type is 5, logon process advapi.  I traced the process id to services.exe.  I can't figure out which service is causing it. The username that it's using is a user's account on the domain.   I disabled FTP, sharepoint, and IIS services since they aren't being used anyway, and restarted the server.  Still no luck.  the Computer name is the server's name, but how can I trace which service is causing this?
Question by:Sean Rhudy
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Expert Comment

ID: 33637032
can you explain more where are you getting this event? in domain controler?
can you see from which machine you are getting the failed logon attempt from?

Author Comment

by:Sean Rhudy
ID: 33637395
I'm getting it on the domain controller, it's the only server.  It's coming from itself, the server.  It gives a process id of 416.  I used task manager and traced it to services.exe.  So it must be one of the services that is trying to authenticate but can't.  I checked all of the started services, and none of them are using this user account.  I'm not sure how to find out exactly which service is causing the issue.

Author Comment

by:Sean Rhudy
ID: 33643070
It's the lsass.exe process that is causing the failure login events.  Could it be an lsass virus?
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Expert Comment

ID: 33648922
have you changed the admin password recently?
go to services and you can see what services are using credentials of admin or any other user.

Expert Comment

ID: 33648941
can you also post event the details of the event log?

Accepted Solution

Sean Rhudy earned 0 total points
ID: 33766818
This ended up being a rogue service that was trying to login.  

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