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Strange Audit Failure Event Flood

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  • Strange Audit Failure Event Flood

    Yesterday, i installed about 12 Microsoft Updates, but didnt restart server.
    When i opened event viewer i was shocked to see 20k+ event messages with following content

    An account failed to log on.

    Security ID: SYSTEM
    Account Name: (My Server Name)$
    Account Domain: My_Domain_Name
    Logon ID: 0x3e7

    Logon Type: 8

    Account For Which Logon Failed:
    Security ID: NULL SID
    Account Name: aben (this names are different, like Administrator, abby, NULL SID - very different names i dont have that kind of accounts in my system)

    Account Domain:

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

    Process Information:
    Caller Process ID: 0x694
    Caller Process Name: C:\Windows\System32\svchost.exe

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

    Detailed Authentication Information:
    Logon Process: Advapi
    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.

    When i rebooted my server, flood stopped..
    Today, i was upgrading my Antivirus - same story, installed new version, haven't rebooted yet - Flood Returned... and again, disappeared after reboot.

    Any idea what this is?
    Virus/malware/hacked activity, or just crappy MS code?

    Help please