Splunk Search

Sysmon Event Parsing

suspicious_link
New Member

I'm having trouble getting all the fields from sysmon automatically parse with the microsoft sysmon add in could someone tell me what i might be missing?

The events are coming into my home splunk instance (8.2.2) but not being fully parsed correctly, I'm pretty sure i need to use a transform, but the one I've tried isn't working (I'm pretty sure i did it wrong but *shrug* no idea if i did or not)

I've installed sysmon on my home computer and have the universal forwarder pointed to my home splunk instance.

I followed the guide i found here: https://hurricanelabs.com/splunk-tutorials/splunking-with-sysmon-series-part-1-the-setup/

As you can see in the screenshot it only extracted some of the fields and the IMPHASH value carried over into some other data.
suspicious_link_0-1633474317729.png

 

inputs.conf for sysmon

 

 

 

[WinEventLog://Microsoft-Windows-Sysmon/Operational]
disabled = false
renderXml = true
source = XMLWinEventLog:Microsoft-Windows-Sysmon/Operational

 

output of my transform with the path:

 

cat /opt/splunk/etc/apps/search/default/transforms.conf

[geo_us_states]
external_type = geo
filename = geo_us_states.kmz

[geo_countries]
external_type = geo
filename = geo_countries.kmz

[geo_attr_us_states]
filename = geo_attr_us_states.csv

[geo_attr_countries]
filename = geo_attr_countries.csv

[geo_hex]
external_type=geo_hex

[xmlwineventlog]
REGEX = "Data Name\=\'(?<_KEY_1>[A-Za-z]+)\'>(?<_VAL_1>[^<]+)<\/Data>"
DELIMS = "'>"

 

 

 

Here's a sample event straight from _raw (looked this event over nothing seemed overly sensitive)

 

 

 

<Event xmlns='http://schemas.microsoft.com/win/2004/08/events/event'><System><Provider Name='Microsoft-Windows-Sysmon' Guid='{5770385f-c22a-43e0-bf4c-06f5698ffbd9}'/><EventID>1</EventID><Version>5</Version><Level>4</Level><Task>1</Task><Opcode>0</Opcode><Keywords>0x8000000000000000</Keywords><TimeCreated SystemTime='2021-10-05T22:36:40.9004216Z'/><EventRecordID>7090</EventRecordID><Correlation/><Execution ProcessID='5908' ThreadID='7428'/><Channel>Microsoft-Windows-Sysmon/Operational</Channel><Computer>eelo</Computer><Security UserID='S-1-5-18'/></System><EventData><Data Name='RuleName'>-</Data><Data Name='UtcTime'>2021-10-05 22:36:40.899</Data><Data Name='ProcessGuid'>{ce4bb586-d378-615c-5b1e-000000007100}</Data><Data Name='ProcessId'>10476</Data><Data Name='Image'>C:\Program Files\SplunkUniversalForwarder\bin\splunk-powershell.exe</Data><Data Name='FileVersion'>-</Data><Data Name='Description'>-</Data><Data Name='Product'>-</Data><Data Name='Company'>-</Data><Data Name='OriginalFileName'>-</Data><Data Name='CommandLine'>"C:\Program Files\SplunkUniversalForwarder\bin\splunk-powershell.exe"</Data><Data Name='CurrentDirectory'>C:\WINDOWS\system32\</Data><Data Name='User'>NT AUTHORITY\SYSTEM</Data><Data Name='LogonGuid'>{ce4bb586-a1ce-615c-e703-000000000000}</Data><Data Name='LogonId'>0x3e7</Data><Data Name='TerminalSessionId'>0</Data><Data Name='IntegrityLevel'>System</Data><Data Name='Hashes'>MD5=1F8722C371906F7B659FA38B39B21661,SHA256=383581B2E6BE7003CCCC0DAFAE75CBA3B0885C441ACDBD9AE76EAAFD9602A022,IMPHASH=1BDECF92268D3D3EF70015DDFEB0FFB9</Data><Data Name='ParentProcessGuid'>{ce4bb586-d191-615c-2a1d-000000007100}</Data><Data Name='ParentProcessId'>18812</Data><Data Name='ParentImage'>C:\Program Files\SplunkUniversalForwarder\bin\splunkd.exe</Data><Data Name='ParentCommandLine'>"C:\Program Files\SplunkUniversalForwarder\bin\splunkd.exe" service</Data></EventData></Event>

 

 

 

Labels (3)
0 Karma

suspicious_link
New Member

i think i fixed it on my own, i had some other sysmon apps installed and disabled all but Splunk_TA_microsoft_sysmon 

AND installed


Splunk Add-on for Microsoft Windows (pretty sure this is what did it)

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Unlocking Unified Insights: New Gigamon Federated Search App for Splunk

In today’s data-heavy environment, organizations are caught in a data distribution dilemma. As data volumes ...

GA: New Data Management App in Splunk Platform

Streamlining Data Management: Introducing a unified experience in Splunk Managing data at scale shouldn’t feel ...

Announcing Modern Navigation: A New Era of Splunk User Experience

We are excited to introduce the Modern Navigation feature in the Splunk Platform, available to both cloud and ...