DFIRHub

Windows event log ยท Microsoft-Windows-Sysmon/Operational25 ProcessTampering (Process image change)

sysmon64.exe -s will list examples of data stored for each Sysmon event. This was done for this particular event.

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

Fields EvtxECmd extracts

5 columns in the EvtxECmd CSV

  • UserName%User%
    • %User% = /Event/EventData/Data[@Name="User"]
  • 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"]
  • PayloadData6Type: %Type%
    • %Type% = /Event/EventData/Data[@Name="Type"]

Sample event

Event XML from the map file

<Event>
  <System>
    <Provider Name="Microsoft-Windows-Sysmon" Guid="5770385f-c22a-43e0-bf4c-06f5698ffbd9"/>
    <EventID>25</EventID>
    <Version>5</Version>
    <Level>4</Level>
    <Task>23</Task>
    <Opcode>0</Opcode>
    <Keywords>0x8000000000000000</Keywords>
    <TimeCreated SystemTime="2020-10-20 11:50:56.9994587"/>
    <EventRecordID>1081</EventRecordID>
    <Correlation/>
    <Execution ProcessID="7212" ThreadID="9748"/>
    <Channel>Microsoft-Windows-Sysmon/Operational</Channel>
    <Computer>DESKTOP-NTSSLJD</Computer>
    <Security UserID="S-1-5-18"/>
  </System>
  <EventData>
    <data name="RuleName" inType="win:UnicodeString" outType="xs:string"/>
    <data name="UtcTime" inType="win:UnicodeString" outType="xs:string"/>
    <data name="ProcessGuid" inType="win:GUID"/>
    <data name="ProcessId" inType="win:UInt32" outType="win:PID"/>
    <data name="Image" inType="win:UnicodeString" outType="xs:string"/>
    <data name="Type" inType="win:UnicodeString" outType="xs:string"/>
  </EventData>
</Event>

References

6 links

Source: evtx/Maps/Microsoft-Windows-Sysmon-Operational_Microsoft-Windows-Sysmon_25.map(opens in new tab) by Andrew Rathbun and contributors(opens in new tab), MIT License(opens in new tab)