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Windows event log ยท Security5140 A network share object was accessed

  • Security
  • 6 fields
  • Security.evtx
  • Microsoft-Windows-Security-Auditing

Fields EvtxECmd extracts

6 columns in the EvtxECmd CSV

  • UserName%domain%\%user%
    • %domain% = /Event/EventData/Data[@Name="SubjectDomainName"]
    • %user% = /Event/EventData/Data[@Name="SubjectUserName"]
  • RemoteHost%IpAddress%
    • %IpAddress% = /Event/EventData/Data[@Name="IpAddress"]
  • PayloadData1Share: %ShareName% (%ShareLocalPath%)
    • %ShareName% = /Event/EventData/Data[@Name="ShareName"]
    • %ShareLocalPath% = /Event/EventData/Data[@Name="ShareLocalPath"]
  • PayloadData2Sid: %SubjectUserSid%
    • %SubjectUserSid% = /Event/EventData/Data[@Name="SubjectUserSid"]
  • PayloadData3AccessList: %AccessList%
    • %AccessList% = /Event/EventData/Data[@Name="AccessList"]
  • PayloadData4AccessMask: %AccessMask%
    • %AccessMask% = /Event/EventData/Data[@Name="AccessMask"]

Value lookups

Codes that EvtxECmd turns into text

AccessList

%%4416
ReadData (or ListDirectory)
%%4417
WriteData (or AddFile)
%%4418
AppendData (or AddSubdirectory or CreatePipeInstance)
%%4419
ReadEA (or Enumerate SubKeys)
%%4420
WriteEA
%%4421
Execute/Traverse
%%4422
DeleteChild
%%4423
ReadAttributes
%%4424
WriteAttributes
%%1537
DELETE
%%1538
READ_CONTROL
%%1539
WRITE_DAC
%%1540
WRITE_OWNER
%%1541
SYNCHRONIZE
%%1542
ACCESS_SYS_SEC

AccessMask

%%4416
ReadData (or ListDirectory)
%%4417
WriteData (or AddFile)
%%4418
AppendData (or AddSubdirectory or CreatePipeInstance)
%%4419
ReadEA (or Enumerate SubKeys)
%%4420
WriteEA
%%4421
Execute/Traverse
%%4422
DeleteChild
%%4423
ReadAttributes
%%4424
WriteAttributes
%%1537
DELETE
%%1538
READ_CONTROL
%%1539
WRITE_DAC
%%1540
WRITE_OWNER
%%1541
SYNCHRONIZE
%%1542
ACCESS_SYS_SEC

Sample event

Event XML from the map file

<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>5140</EventID>
    <Version>1</Version>
    <Level>0</Level>
    <Task>12808</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8020000000000000</Keywords>
    <TimeCreated SystemTime="2015-09-18T02:45:13.581231400Z"/>
    <EventRecordID>268495</EventRecordID>
    <Correlation/>
    <Execution ProcessID="4" ThreadID="772"/>
    <Channel>Security</Channel>
    <Computer>DC01.contoso.local</Computer>
    <Security/>
  </System>
  <EventData>
    <Data Name="SubjectUserSid">S-1-5-21-3457937927-2839227994-823803824-1104</Data>
    <Data Name="SubjectUserName">dadmin</Data>
    <Data Name="SubjectDomainName">CONTOSO</Data>
    <Data Name="SubjectLogonId">0x541f35</Data>
    <Data Name="ObjectType">File</Data>
    <Data Name="IpAddress">10.0.0.100</Data>
    <Data Name="IpPort">49212</Data>
    <Data Name="ShareName">\\\\\*\\Documents</Data>
    <Data Name="ShareLocalPath">\\??\\C:\\Documents</Data>
    <Data Name="AccessMask">0x1</Data>
    <Data Name="AccessList">%%4416</Data>
  </EventData>
</Event>

References

3 links

Source: evtx/Maps/Security_Microsoft-Windows-Security-Auditing_5140.map(opens in new tab) by Eric Zimmerman and Andrew Rathbun and contributors(opens in new tab), MIT License(opens in new tab)