We have not been able to test, simulate, or build datasets for this detection. Use at your own risk. This analytic is NOT supported.

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This search looks for suspicious Java classes that are often used to exploit remote command execution in common Java frameworks, such as Apache Struts.

  • Type: Anomaly
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2018-12-06
  • Author: Jose Hernandez, Splunk
  • ID: if1fea6da-3c86-4c1d-b255-fc3b2781a491
`stream_http` http_method=POST http_content_length>1 
| regex form_data="(?i)java\.lang\.(?:runtime
| rename src_ip as src 
| stats count earliest(_time) as firstTime, latest(_time) as lastTime, values(url) as uri, values(status) as status, values(http_user_agent) as http_user_agent by src, dest 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `suspicious_java_classes_filter`

Associated Analytic Story

How To Implement

In order to properly run this search, Splunk needs to ingest data from your web-traffic appliances that serve or sit in the path of your Struts application servers. This can be accomplished by indexing data from a web proxy, or by using network traffic-analysis tools, such as Splunk Stream or Bro.

Required field

  • _time
  • http_method
  • http_content_length
  • src_ip
  • url
  • status
  • http_user_agent
  • src
  • dest

Kill Chain Phase

  • Exploitation

Known False Positives

There are no known false positives.


Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

source | version: 1