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Potential JAVA/JNDI Exploitation Attempt

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Potential JAVA/JNDI Exploitation Attempt

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Identifies an outbound network connection by JAVA to LDAP, RMI or DNS standard ports followed by a suspicious JAVA child processes. This may indicate an attempt to exploit a JAVA/NDI (Java Naming and Directory Interface) injection vulnerability.

Rule type: eql

Rule indices:

  • auditbeat-*
  • logs-endpoint.events.*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Linux
  • OS: macOS
  • Use Case: Threat Detection
  • Tactic: Execution
  • Use Case: Vulnerability
  • Data Source: Elastic Defend

Version: 104

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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sequence by host.id with maxspan=1m
 [network where event.action == "connection_attempted" and
  process.name : "java" and
  /*
     outbound connection attempt to
     LDAP, RMI or DNS standard ports
     by JAVA process
   */
  destination.port in (1389, 389, 1099, 53, 5353)] by process.pid
 [process where event.type == "start" and

  /* Suspicious JAVA child process */
  process.parent.name : "java" and
   process.name : ("sh",
                   "bash",
                   "dash",
                   "ksh",
                   "tcsh",
                   "zsh",
                   "curl",
                   "perl*",
                   "python*",
                   "ruby*",
                   "php*",
                   "wget")] by process.parent.pid

Framework: MITRE ATT&CKTM

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