Splunk Search

splunk query to list if anyone removed logs from unix server(syslog servers)?

pavanae
Builder

Base query :- sourcetype=syslog

How can I or where can I find if anyone removed any log files on unix syslog server?
what are the sample unix commands that used to remove any log files?

Any inputs would be highly appriciated.

0 Karma
1 Solution

koshyk
Super Champion

Your question is very broad.

  1. The system logrotation itself can remove/rotate logs. So it makes it difficult to detect who actually removed the log files
  2. You can implement audit in Linux systems and ensure the relevant files are monitored. You need to print-out auid, uid and all relevant information to detect who actually did modification or delete. Then you can onboard these audit data into Splunk
  3. You can employ a professional software (File Integrity monitor) software to check actions for specific file
  4. A cheap option is to detect file changes by writing a simple shell script and packaging this as a "scripted inputs" app to find file modified time, file creation time etc. A sample script is provided in this link and onboard into Splunk

View solution in original post

koshyk
Super Champion

Your question is very broad.

  1. The system logrotation itself can remove/rotate logs. So it makes it difficult to detect who actually removed the log files
  2. You can implement audit in Linux systems and ensure the relevant files are monitored. You need to print-out auid, uid and all relevant information to detect who actually did modification or delete. Then you can onboard these audit data into Splunk
  3. You can employ a professional software (File Integrity monitor) software to check actions for specific file
  4. A cheap option is to detect file changes by writing a simple shell script and packaging this as a "scripted inputs" app to find file modified time, file creation time etc. A sample script is provided in this link and onboard into Splunk
Get Updates on the Splunk Community!

AppDynamics Summer Webinars

This summer, our mighty AppDynamics team is cooking up some delicious content on YouTube Live to satiate your ...

SOCin’ it to you at Splunk University

Splunk University is expanding its instructor-led learning portfolio with dedicated Security tracks at .conf25 ...

Credit Card Data Protection & PCI Compliance with Splunk Edge Processor

Organizations handling credit card transactions know that PCI DSS compliance is both critical and complex. The ...