Login Failure Alerts

Hi,

We have a 'failed login check' on our server and these errors are showing every 30 seconds.

I have checked all the local services on the server and none of them are using an old admin account etc for the 'service logon'

How else could these errors show, it's hard to pin point the issue with these errors.

Any ideas?

thanks

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An account failed to log on.

Subject:
      Security ID:            NULL SID
      Account Name:            -
      Account Domain:            -
      Logon ID:            0x0

Logon Type:                  3

Account For Which Logon Failed:
      Security ID:            NULL SID
      Account Name:            ADMINISTRATOR
      Account Domain:            

Failure Information:
      Failure Reason:            Unknown user name or bad password.
      Status:                  0xc000006d
      Sub Status:            0xc000006a

Process Information:
      Caller Process ID:      0x0
      Caller Process Name:      -

Network Information:
      Workstation Name:      
      Source Network Address:      -
      Source Port:            -

Detailed Authentication Information:
      Logon Process:            NtLmSsp
      Authentication Package:      NTLM
      Transited Services:      -
      Package Name (NTLM only):      -
      Key Length:            0

This event is generated when a logon request fails. It is generated on the computer where access was attempted.

The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe.

The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network).

The Process Information fields indicate which account and process on the system requested the logon.

The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases.

The authentication information fields provide detailed information about this specific logon request.
      - Transited services indicate which intermediate services have participated in this logon request.
      - Package name indicates which sub-protocol was used among the NTLM protocols.
      - Key length indicates the length of the generated session key. This will be 0 if no session key was requested.
ryank85Asked:
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Omar SoudaniSystem Support EngineerCommented:
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ryank85Author Commented:
Thanks for the info - the issue is how can I tell which machine is failing the authentication to the Server.

The error above doesn't detail any PC Name etc?

thanks
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Naveen SharmaCommented:
4625: An account failed to log on

This Event is usually caused by a stale hidden credential. Remove any items that appear in the list of Stored User Names and Passwords. Restart the computer.

Here is an article which provides step-wise instructions to track the source of failed logon attempts in AD - https://www.petenetlive.com/KB/Article/0001209

You can try to use Account Lockout Tools along with some AD Auditing. Be aware that there can be a multitude of causes fot account lockouts. The most common ones are:

- Wrong password input from user
- User changes password, and has some cached credentials with the old password (check credentials in Control Panel and Internet Explorer)
- Scheduled tasks and services running with an old password
- Malware, Service accounts and Active Directory replication
- Disconnected Terminal Server sessions
- A SMARTPHONE, to get in detailed here is an article for what are the common root causes of account lockouts and how to resolve them.

Refer to below links for more information about issue and solution:

https://serverfault.com/questions/686393/event-4625-audit-failure-null-sid-failed-network-logons

https://www.lepide.com/how-to/identify-the-source-of-account-lockouts-in-active-directory.html

If the above information doesn't help, install NetWork Monitor and let it capture data.
https://www.microsoft.com/en-us/download/details.aspx?id=4865
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Sara TeasdaleCommented:
I found a tool that brings to you a report about you user, if he got locked, is the user had exceeded the password limit and others things.

Check out Active Directory Locked Out Users Report http://www.manageengine.com/products/ad-manager/windows-active-directory-account-lockout-disabled-users-reports.html#windows_active_directory_locked_out_users_report

Please follow the steps in the link to get alert and audit all logon and logon attempts

http://www.howtogeek.com/123568/how-to-get-email-notifications-whenever-someone-logs-into-your-computer/

https://www.netwrix.com/account_lockout_examiner.html

https://www.isdecisions.com/products/userlock/
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R@f@r P@NC3RVirtualization SpecialistCommented:
Good Morning

The error you receive is per user who has your account logged on to another PC, which is why you receive the alert constantly. I support Naveen Sharma's solution, it is the most feasible procedure in this case.

Similarly validates the event viewer to see if you find another type of error.

I remain attentive to your comments.

Regards...
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Naveen SharmaCommented:
Here is another informative article may help you to troubleshoot account lockout:
http://expert-advice.org/active-directory/how-to-troubleshoot-account-lockout-in-active-directory/
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Naveen SharmaCommented:
Answered, no further query from author.
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Windows Server 2008

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