We have a single sbs2011 serverwhich was working OK, and I have just noticed that we are suddenly getting numerous errors in our security event log, as follows :-
An account failed to log on.
Security ID: SYSTEM
Account Name: SBS2011$
Account Domain: HDS1
Logon ID: 0x3e7
Logon Type: 10
Account For Which Logon Failed:
Security ID: NULL SID
Account Name: root
Account Domain: SBS2011
Failure Reason: Unknown user name or bad password.
Sub Status: 0xc0000064
Caller Process ID: 0x10d0
Caller Process Name: C:\Windows\System32\winlog
Workstation Name: SBS2011
Source Network Address: 220.127.116.11
Source Port: 56920
Detailed Authentication Information:
Logon Process: User32
Authentication Package: Negotiate
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.
The thing that concerned me, was the apparent external IP address, and wondered if somone was trying to hack in??
Can anyone advise what might be causing this, and how to resolve it??
I have also attached a screenshot of the event log.
Any help would be much appreciated.