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Windows 2008 R2 AD - Event ID 4625 Logged Every Second

TriumphLTD
TriumphLTD asked
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Last Modified: 2012-05-12
Hi There,

I have a Windows 2008 R2 domain, DC01 is the domain controller that holds the FMSO roles and FP01 is an ADC.

On FP01 I am getting event ID 4625 logged in the security log at least once a second. However I do not get this error on DC01. The event is:



An account failed to log on.

Subject:
      Security ID:            SYSTEM
      Account Name:            FP01$
      Account Domain:            INTERNALDOMAINNAME
      Logon ID:            0x3e7

Logon Type:                  8

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:      0x4a8
      Caller Process Name:      C:\Windows\System32\svchost.exe

Network Information:
      Workstation Name:      FP01
      Source Network Address:      -
      Source Port:            -

Detailed Authentication Information:
      Logon Process:            Advapi  
      Authentication Package:      MICROSOFT_AUTHENTICATION_PACKAGE_V1_0
      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.



Is this a genuine security breach? If not is there a way I can stop these events being logged? That said I don't want to mask a problem by hiding the veents if they are relevant.

Thanks

Dave

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