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Windows Event 4776 on a local PC

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#1 Suncatcher


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Posted 21 July 2017 - 11:00 AM

Hi there,

I am inspecting my PC after ransomware attack and do security logs analysis. What attracts my interest a lot is a 4776 event, which looks like this:

5/17/2017 12:06:17 PM Microsoft-Windows-Security-Auditing    4776 The computer attempted to validate the credentials for an account.                                                                        
                                                                  Authentication Package:    MICROSOFT_AUTHENTICATION_PACKAGE_V1_0                                                                          
                                                                  Logon Account:    ADMINISTRATOR                                                                                                           
                                                                  Source Workstation:                                                                                                                       
                                                                  Error Code:    0xC000006A     

This is a local home PC obviously not included not in any domain, whilst official help states that this event is generated on a domain PC (or while connecting to domain controller).

Am I missing something? Does this a general NTLM auth event, which can happen everywhere or it is some sophisticated attack when attackers were able to spoof domain authentication request?

Edited by Suncatcher, 21 July 2017 - 11:01 AM.

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