Splunk Search

EventCode Subsearch

jeradb
Explorer

I have an application that I am trying to monitor.  There is a specific event code for when the tool is opened to modify the tool (EventCode=250).  There is an EventCode for when it is closed (EventCode=100).  These two codes display a user name, but the events between them do not.  How can I write a search to look for these two events then display the changes between them with the username who completed the change?  

| from datamodel:P3 | search EventCode=250 OR 100 OR 70 OR 80
| eval user = coalesce(User, Active_User)
| eval Event_Time=strftime(_time,"%m/%d/%y %I:%M:%S %P")

| table Event_Time, host,user,Device_Added,Device_SN,Device_ID,EventCode, EventDescription

Event_Time                        host              user      Device_Added      Device_SN       Device_ID      EventCode 
02/22/24 08:49:44 am Test-Com   xxxxx                                                                                                 100
02/21/24 03:59:12 pm Test-Com   xxxxx                                                                                                  250
02/21/24 03:56:08 pm Test-Com   xxxxx                                                                                                  100
02/21/24 03:56:00 pm Test-Com                            USB 1                   12345          PID_1                   70 
02/21/24 03:56:00 pm Test-Com                            USB 2                    6789            PID_2                   70 
02/21/24 03:51:10 pm Test-Com                            USB 1                   12345          PID_1                   80  
02/21/24 03:50:44 pm Test-Com     xxxxx                                                                                                  250

Labels (3)
0 Karma

yuanliu
SplunkTrust
SplunkTrust

If the illustrated fields are all you have, the only link between 250 -> 100 (with user) and the rest of events (without) is host.  I highly doubt if this can be sufficient to determine what a user have done between 250 and 100, unless this tool is strictly single-user and no other things can generate any of these events.

If the tool is single-user only, you can use transaction to group these events together, like

| transaction host startswith="EventCode=250" endswith="EventCode=100"

Once transactions are established, you can then glean completed transactions for event codes that are not 250 and 100.  For example,

| transaction host startswith="EventCode=250" endswith="EventCode=100"​
| stats values(EventCode) as EventCode values(user) as user by host
| eval EventCode = mvfilter(NOT EventCode IN ("250", "100"))

Hope this helps.

Tags (1)
0 Karma

jeradb
Explorer

@yuanliu  Is there a way to say if EventCode=70 look upstream for EventCode=250 and join User?  I am only trying to capture who created the event.

0 Karma

yuanliu
SplunkTrust
SplunkTrust

This is very much a question of efficiency.  If you have a relatively small number of event 70 in a short period of time, but event 250 was some long time ago, using subsearch would be more efficient than retrieving both types of events for a long period of time.

You also need to tell us which EventCode's give you User, which give you Active_User.  Assuming that EventCode 250 gives you Active_User but 70 gives you User, you can do something like

| from datamodel:P3
| search EventCode=250 earliest=-1mon ``` earliest value for demonstration purpose only ```
    [from datamodel:P3
    | search EventCode=70 earliest=-1h ``` earliest value for demonstration purpose only ```
    | stats values(User) as Active_User ``` assuming User is present in EventCode 70 to matche Active_User in EventCode 250 ]

 

0 Karma
Get Updates on the Splunk Community!

Splunk Custom Visualizations App End of Life

The Splunk Custom Visualizations apps End of Life for SimpleXML will reach end of support on Dec 21, 2024, ...

Introducing Splunk Enterprise 9.2

WATCH HERE! Watch this Tech Talk to learn about the latest features and enhancements shipped in the new Splunk ...

Adoption of RUM and APM at Splunk

    Unleash the power of Splunk Observability   Watch Now In this can't miss Tech Talk! The Splunk Growth ...