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win_sec-4625-0xC0000072-uu-failure

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    Hello, 

    I keep receiving the flowing alerts from my firewall saying that a Guest account tried to access my server 817 times. Should i be concerned about this? 

    Daily review of log data has generated the following 2 security concerns. Please refer to the Daily PCI Report PDF to see all security concerns.

    If the following behavior is unexpected, investigation is highly recommended.

    An attempt to access 'myserver@server.com' was detected using the account 'guest' 817 times.

    Below are the details of the security concern:

    Detected By : myservrer@server.com
    Source Address: my server
    Event Type : win_sec-4776-0xC0000072-ux-failure
    Username : guest
    Attempt Count : 817
    Description : auth.os.login.deny
    Date : Sun Mar 11 04:48:23 CDT 2018


    Event Count : 807
    Event Type : win_sec-4625-0xC0000072-uu-failure
    Detector : myservrer@server.com
    Description : auth.os.login.deny
    Severity : Medium
    Username : guest
    Source Address: My server
    Specific information about this type of windows event can be found here: 


    Monday, March 12, 2018 12:49 PM
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    Hi Wascar,

    Thanks for your question.

    This event is generated when a logon request fails. It is generated on the computer where access was attempted. The core issue for the is probably that Network and Sharing Center wants to know whether the guest account is enabled for network access. Please refer to the following link to see detailed,

    https://social.technet.microsoft.com/Forums/en-US/a2ae4591-f6e9-4177-8985-f47cdced3dca/event-id-4625-null-sid-guest-account-currently-disabled?forum=winserverNAP

    Highly appreciate your effort and time. If you have any questions and concerns, please feel free to let me know.

    Wish you have a nice day!

    Best regards,

    Michael

    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    Tuesday, March 13, 2018 10:24 AM
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    Hi Wascar,

    How are things going on? Was your issue resolved?

    Please let us know if you would like further assistance.

    Wish you have a nice day!

    Best regards,

    Michael

    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    Thursday, March 15, 2018 10:14 AM
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    Hi Wascar,

    How are things going on? Was your issue resolved?

    Please let us know if you would like further assistance.

    Wish you have a nice day!

    Best regards,

    Michael

    Please remember to mark the replies as an answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    Tuesday, March 20, 2018 9:57 AM
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