Local user account attempting domain logon Expand / Collapse
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Posted 8/19/2015 1:09:27 PM
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Last Login: 8/19/2015 1:00:31 PM
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I have a strange instance of event 4625 being generated that I can't explain.

A member server of an Active Directory domain has a local user account which is being used to run a service for an application. The domain controllers are full of 4625 events recording failed logons. What I can understand is why a service running under the context of a local user on a member server would attempt to authenticate against a domain controller??

Here is the obfuscated log details:

LogName=Security
SourceName=Microsoft Windows security auditing.
EventCode=4625
EventType=0
Type=Information
ComputerName=dc01.mydomain.com
TaskCategory=Logon
OpCode=Info
RecordNumber=2015261959
Keywords=Audit Failure
Message=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: local_user
Account Domain: MemberServer

Failure Information:
Failure Reason: Unknown user name or bad password.
Status: 0xc000006d
Sub Status: 0xc0000064

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

Network Information:
Workstation Name: MemberServer
Source Network Address: 192.168.1.5
Source Port: 54831

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

Any thoughts?

Paul
Post #4826
Posted 8/23/2015 8:14:19 PM
Supreme Being

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Group: Moderators
Last Login: 11/14/2013 3:17:47 PM
Posts: 237, Visits: 0
I believe that domain users can be assigned local administrator rights to a machine. Could this be the case?
Post #4837
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