DFIRHub

Windows event log ยท Microsoft-Windows-Sysmon/Operational27 FileBlockExecutable (An executable was blocked)

  • Sysmon
  • 8 fields
  • Microsoft-Windows-Sysmon%4Operational.evtx
  • Microsoft-Windows-Sysmon

Fields EvtxECmd extracts

8 columns in the EvtxECmd CSV

  • ExecutableInfo%Image%
    • %Image% = /Event/EventData/Data[@Name="Image"]
  • PayloadData1ProcessID: %ProcessID%, ProcessGUID: %ProcessGUID%
    • %ProcessGUID% = /Event/EventData/Data[@Name="ProcessGuid"]
    • %ProcessID% = /Event/EventData/Data[@Name="ProcessId"]
  • PayloadData2RuleName: %RuleName%
    • %RuleName% = /Event/EventData/Data[@Name="RuleName"]
  • PayloadData3%Hashes%
    • %Hashes% = /Event/EventData/Data[@Name="Hashes"]
  • PayloadData4TargetFilename: %TargetFilename%
    • %TargetFilename% = /Event/EventData/Data[@Name="TargetFilename"]
  • PayloadData5IsExecutable: %IsExecutable%
    • %IsExecutable% = /Event/EventData/Data[@Name="IsExecutable"]
  • PayloadData6Archived: %Archived%
    • %Archived% = /Event/EventData/Data[@Name="Archived"]
  • UserName%User%
    • %User% = /Event/EventData/Data[@Name="User"]

Sample event

Event XML from the map file

<Event>
  <System>
    <Provider Name="Microsoft-Windows-Sysmon" Guid="5770385f-c22a-43e0-bf4c-06f5698ffbd9"/>
    <EventID>27</EventID>
    <Version>5</Version>
    <Level>4</Level>
    <Task>27</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8000000000000000</Keywords>
    <TimeCreated SystemTime="2022-08-23 06:36:04.1164538"/>
    <EventRecordID>66</EventRecordID>
    <Correlation/>
    <Execution ProcessID="18500" ThreadID="23716"/>
    <Channel>Microsoft-Windows-Sysmon/Operational</Channel>
    <Computer>VMWIN10</Computer>
    <Security UserID="S-1-5-18"/>
  </System>
  <EventData>
    <Data Name="RuleName">-</Data>
    <Data Name="UtcTime">2022-08-23 06:36:04.115</Data>
    <Data Name="ProcessGuid">079ec07f-0ce3-62fc-2101-00000000c900</Data>
    <Data Name="ProcessId">9336</Data>
    <Data Name="User">VMWIN10\user</Data>
    <Data Name="Image">C:\Windows\Explorer.EXE</Data>
    <Data Name="TargetFilename">C:\Users\user\Downloads\nc.exe</Data>
    <Data Name="Hashes">SHA256=E8FBEC25DB4F9D95B5E8F41CCA51A4B32BE8674A4DEA7A45B6F7AEB22DBC38DB</Data>
  </EventData>
</Event>

References

3 links

Source: evtx/Maps/Microsoft-Windows-Sysmon-Operational_Microsoft-Windows-Sysmon_27.map(opens in new tab) by Gabriele Zambelli @gazambelli and contributors(opens in new tab), MIT License(opens in new tab)