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https://github.com/splunk/security_content
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Eric
47 lines
2.0 KiB
YAML
47 lines
2.0 KiB
YAML
name: Suspicious Java Classes
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id: 6ed33786-5e87-4f55-b62c-cb5f1168b831
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version: 5
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date: '2025-05-02'
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author: Jose Hernandez, Splunk
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status: experimental
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type: Anomaly
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description: The following analytic identifies suspicious Java classes often used
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for remote command execution exploits in Java frameworks like Apache Struts. It
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detects this activity by analyzing HTTP POST requests with specific content patterns
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using Splunk's `stream_http` data source. This behavior is significant because it
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may indicate an attempt to exploit vulnerabilities in web applications, potentially
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leading to unauthorized remote code execution. If confirmed malicious, this activity
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could allow attackers to execute arbitrary commands on the server, leading to data
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breaches, system compromise, and further network infiltration.
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data_source: []
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search: '`stream_http` http_method=POST http_content_length>1 | regex form_data="(?i)java\.lang\.(?:runtime|processbuilder)"
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| rename src_ip as src | stats count earliest(_time) as firstTime, latest(_time)
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as lastTime, values(url) as uri, values(status) as status, values(http_user_agent)
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as http_user_agent by src, dest | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `suspicious_java_classes_filter`'
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how_to_implement: In order to properly run this search, Splunk needs to ingest data
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from your web-traffic appliances that serve or sit in the path of your Struts application
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servers. This can be accomplished by indexing data from a web proxy, or by using
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network traffic-analysis tools, such as Splunk Stream or Bro.
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known_false_positives: There are no known false positives.
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references: []
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rba:
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message: Suspicious Java Classes in HTTP requests involving $src$ and $dest$
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risk_objects:
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- field: src
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type: system
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score: 25
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- field: dest
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type: system
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score: 25
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threat_objects: []
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tags:
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analytic_story:
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- Apache Struts Vulnerability
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asset_type: Endpoint
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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security_domain: threat
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