Here is a dashboard I built to help you understand the activity of services and MSI installs within a Windows machine. This dashboard utilizes Post Processing so there is only 2 searches that are launched when the dashboard is loaded to minimize impact on search queuing. Add-on’s: Splunk Add-on for Microsoft Windows – https://splunkbase.splunk.com/app/742/ Video overview […]
Splunk License Consumption via _introspection
Just sharing a query I found useful lately when licensing dashboards are being silly. Mileage may vary. index=”_introspection” component=”licensing.stack”| bucket _time span=1d | stats latest(“data.consumption”) as dataConsumption latest(“data.pools{}.quota”) as poolQuota by _time| eval pctUsed=(dataConsumption/poolQuota * 100)| timechart span=1d max(pctUsed)
Disk Usage per Index by Indexer
Summary: Instead of grabbing data from all time, using the dbinspect command will allow administrators to quickly determine how big an index is. There are additional fields in the dbinspect, so explore that to gain other data pivots. |dbinspect index=_internal | stats sum(sizeOnDiskMB) by splunk_server
Search to show what apps are ready to be updated
| rest splunk_server=local /services/apps/local | search update.version=* | table title version update.version If that Splunk has internet access, it’ll have the update.* fields filled with the latest version if there is an update available for any app installed on that system. The splunk_server filter should be usable for querying search peers as well. Using that […]
Get Fields Defined for Multiple KVStore Collections
Description: This query gets all collection titles in your instance, then runs a map function on them to get their fields from a single query. The reason this is necessary is because the API returns collection fields as columns, not values, and if you just table all fields for multiple collections, you’ll end up with […]
Correlation Search Audit Search
Use this search to audit your correlation searches. It includes various information like who is the author of the correlation search, who modified it, etc. In addition to that, the search also gives you an brief info on whether the correlation search has been triggered in past 30 days or not considering it has notable […]
Timechart of Linux Logons
The following splunk search will return a timechart of all successful logons for a given linux environment (regex provided): sourcetype=linux_secure |rex “\w{3}\s\d{1,2}\s\d{2}:\d{2}:\d{2}\s\S+\s(?<session>gdm-\w+)\S:\s”| search session=gdm-password | rex “\w{3}\s\d{1,2}\s\d{2}:\d{2}:\d{2}\s(?<hostname>\S+)\s.+\Sgdm-password:auth\S:\s(?<authstatus>\w+\s\w+);\s.+user=(?<username>\S+)” | search authstatus=”authentication success” | timechart count(username) The following splunk search will return a timechart of all failed logons for a given linux environment(regex provided): sourcetype=linux_secure |rex “\w{3}\s\d{1,2}\s\d{2}:\d{2}:\d{2}\s\S+\s(?<session>gdm-\w+)\S:\s”| […]
List of Failed Login Attempts in Linux
This Splunk search will show a count of all user accounts and a number of times they have attempted to logon. The REGEX is written into the query, remove it if you are already extracting those field names: sourcetype=linux_secure | rex “\w{3}\s\d{1,2}\s\d{2}:\d{2}:\d{2}\s\S+\s(?gdm-\w+)\S:\s” | search session=gdm-password | rex “\w{3}\s\d{1,2}\s\d{2}:\d{2}:\d{2}\s(?\S+)\s.+\Sgdm-password:auth\S:\s(?\w+\s\w+);\s.+user=(?\S+)” | search authstatus=”authentication failure” | stats count […]
Linux Deletion of SSL Certificate (mitre : T1485 , T1070.004 , T1070)
| tstats `summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Filesystem where Filesystem.action=deleted Filesystem.file_path = “/etc/ssl/certs/*” Filesystem.file_path IN (“*.pem”, “*.crt”) by _time span=1h Filesystem.file_name Filesystem.file_path Filesystem.dest Filesystem.process_guid Filesystem.action | `drop_dm_object_name(Filesystem)` |rename process_guid as proc_guid |join proc_guid, _time [ | tstats `summariesonly` count FROM datamodel=Endpoint.Processes where Processes.parent_process_name != unknown by _time span=1h Processes.process_id Processes.process_name Processes.process Processes.dest Processes.parent_process_name Processes.parent_process Processes.process_path Processes.process_guid | `drop_dm_object_name(Processes)` |rename process_guid as proc_guid […]
Investigate by MAC, IP all VPN authentications through CISCO_ISE
Helps to investigate authentications through CISCO_ISE device. This identifies who logs in, the MAC address and IP for any use cases index=<your cisco index> “<your IP>” |rex field=”cisco_av_pair” “mdm-tlv=device-mac=(?<MAC_ID>\w+-\w+-\w+-\w+-\w+-\w+)” |rex field=”cisco_av_pair” “mdm-tlv=device-platform=(?<OS>\w+)” |rex field=_raw “(?<IP><IP regex>)” |iplocation IP |stats c sum(Acct_Input_Packets) as Packets_In sum(Acct_Output_Packets) as Packets_Out by _time User_Name Framed_Protocol src_mac City Country Region IP […]
List Notable events with closing history details
`notable` | stats latest(lastTime) as LastTimeSeen values(rule_name) as “Rule Name” values(comment) as “Historical Analysis” values(user) as User by _time event_id, urgency | eval LastTimeSeen=strftime(LastTimeSeen,”%+”)
Memory Usage (MB) per Splunk Process Class
Use the following search with a column chart visualisation. It will give you a good overview of what Splunk processes use the most memory: index=_introspection sourcetype=splunk_resource_usage component=PerProcess host=* | eval process = ‘data.process’ | eval args = ‘data.args’ | eval sid = ‘data.search_props.sid’ | eval elapsed = ‘data.elapsed’ | eval mem_used = ‘data.mem_used’ | eval mem […]
Active Directory Password change attempts
Use the following search to create a stacked barchart of AD Password change attempts: source=”WinEventLog:Security” “EventCode=4723″ src_user!=”*$” src_user!=”_svc_*” | eval daynumber=strftime(_time,”%Y-%m-%d”) | chart count by daynumber, status | eval daynumber = mvindex(split(daynumber,”-“),2)
Memory Usage and Information on Splunk Server
This Splunk Search Query will perform a rest call to indicate current memory consumption on the Splunk server(s) itself/themselves: *NOTE* The following has been modified from the “Distributed Management Console” to be more generic for a copy, paste, and search example. | rest splunk_server=* /services/server/status/resource-usage/hostwide | stats first(normalized_load_avg_1min) as load_average first(cpu_system_pct) as system, first(cpu_user_pct) as […]
Number of Hosts the Root Account was Detected on
The following splunk query example will return the total number of hosts the Root account was detected on in a given time range *NOTE* if the host field is being autoextracted (for instance if you are using a universal forwarder) you will not need the regex command and can call upon the auto extracted fieldname […]
Splunk Query to report on users logging on to the Splunk Web Console
index=_audit tag=authentication info=succeeded |dedup user | table user timestamp
Clearing of Windows Audit Logs
This Splunk search will show anytime the windows audit logs (event viewer logs) have been cleared or deleted. Ensure the Splunk App for Windows is installed, you can grab it here: https://apps.splunk.com/app/742/ source=WinEventLog:security (EventCode=1102 OR EventCode=517) | eval Date=strftime(_time, “%Y/%m/%d”) | stats count by Client_User_Name, host, index, Date | sort – Date | rename Client_User_Name as […]
Top 10 most active Users in Linux
The following splunk query example will return the top 10 most active users in a given time range sourcetype=linux_secure | rex “\suser[^’](?<User>\S+\w+)” | top limit=10 User
Count of Unique Users in a Linux Environment
This splunk query will return the total number of unique users in a given time range. sourcetype=linux_secure | rex “\suser[^’](?<User>\S+\w+)” | stats dc(User)
Accounts Deleted in a Windows Environment
These splunk queries will return deleted accounts in Associated with Windows Environments (NOTE* The 2003 query requires that the splunk for windows app be installed): 2003: sourcetype=WinEventLog:Security (EventCode=630) | eval Date=strftime(_time, “%Y/%m/%d”) | stats count by Date, Target_Account_Name, Caller_User_Name, Type, host | sort – Date | rename Target_Account_Name as “Deleted Account” | rename Caller_User_Name as […]
