name: Windows Event Log Security 4776
id: 1da9092a-c795-4a26-ace8-d43855524e96
version: 4
creation_date: '2024-05-22'
modification_date: '2026-05-13'
author: Patrick Bareiss, Splunk
description: Logs NTLM authentication attempts, including details about the account name, authentication status, and the originating workstation.
mitre_components:
    - User Account Authentication
    - Logon Session Metadata
    - User Account Metadata
    - Application Log Content
source: XmlWinEventLog:Security
sourcetype: XmlWinEventLog
separator: EventCode
separator_value: '4776'
supported_TA:
    - name: Splunk Add-on for Microsoft Windows
      url: https://splunkbase.splunk.com/app/742
      version: 10.0.1
fields:
    - _time
    - Channel
    - Computer
    - Error_Code
    - EventCode
    - EventData_Xml
    - EventID
    - EventRecordID
    - Guid
    - Keywords
    - Level
    - Name
    - Opcode
    - PackageName
    - ProcessID
    - RecordNumber
    - Source_Workstation
    - Status
    - SystemTime
    - System_Props_Xml
    - TargetUserName
    - Target_User_Name
    - Task
    - ThreadID
    - Version
    - Workstation
    - action
    - app
    - date_hour
    - date_mday
    - date_minute
    - date_month
    - date_second
    - date_wday
    - date_year
    - date_zone
    - dest
    - dvc
    - dvc_nt_host
    - event_id
    - eventtype
    - host
    - id
    - index
    - linecount
    - name
    - product
    - punct
    - signature
    - signature_id
    - source
    - sourcetype
    - splunk_server
    - src
    - src_nt_host
    - status
    - subject
    - ta_windows_action
    - ta_windows_status
    - tag
    - tag::action
    - tag::eventtype
    - timeendpos
    - timestartpos
    - user
    - user_group
    - vendor
    - vendor_product
output_fields:
    - dest
example_log: <Event xmlns='http://schemas.microsoft.com/win/2004/08/events/event'><System><Provider Name='Microsoft-Windows-Security-Auditing' Guid='{54849625-5478-4994-A5BA-3E3B0328C30D}'/><EventID>4776</EventID><Version>0</Version><Level>0</Level><Task>14336</Task><Opcode>0</Opcode><Keywords>0x8010000000000000</Keywords><TimeCreated SystemTime='2022-09-08T19:03:50.057600300Z'/><EventRecordID>391615</EventRecordID><Correlation/><Execution ProcessID='644' ThreadID='6100'/><Channel>Security</Channel><Computer>win-dc-mvelazco-02713-392.attackrange.local</Computer><Security/></System><EventData><Data Name='PackageName'>MICROSOFT_AUTHENTICATION_PACKAGE_V1_0</Data><Data Name='TargetUserName'>KSYLEFUA</Data><Data Name='Workstation'>WIN-HOST-MVELAZ</Data><Data Name='Status'>0xc0000064</Data></EventData></Event>