Suspicious JAR Child Process

Elastic Stack Serverless Security

Identifies suspicious child processes of a Java Archive (JAR) file. JAR files may be used to deliver malware in order to evade detection.

Rule type: eql

Rule indices:

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

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

• Elastic
• Host
• Linux
• macOS
• Threat Detection
• Execution

Version: 2

Rule authors:

• Elastic

Rule license: Elastic License v2

process where event.type in ("start", "process_started") and
  process.parent.name : "java" and
  process.name : ("sh", "bash", "dash", "ksh", "tcsh", "zsh", "curl", "wget") and
  process.args : "-jar" and process.args : "*.jar" and
  /* Add any FP's here */
  not process.executable : ("/Users/*/.sdkman/*", "/Library/Java/JavaVirtualMachines/*") and
  not process.args : ("/usr/local/*", "/Users/*/github.com/*", "/Users/*/src/*")

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Execution
  • ID: TA0002
  • Reference URL: https://attack.mitre.org/tactics/TA0002/

• Technique:

  • Name: Command and Scripting Interpreter
  • ID: T1059
  • Reference URL: https://attack.mitre.org/techniques/T1059/

• Sub-technique:

  • Name: JavaScript
  • ID: T1059.007
  • Reference URL: https://attack.mitre.org/techniques/T1059/007/