Potential Unauthorized Access via Wildcard Injection Detected

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Potential Unauthorized Access via Wildcard Injection Detected

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This rule monitors for the execution of the "chown" and "chmod" commands with command line flags that could indicate a wildcard injection attack. Linux wildcard injection is a type of security vulnerability where attackers manipulate commands or input containing wildcards (e.g., *, ?, []) to execute unintended operations or access sensitive data by tricking the system into interpreting the wildcard characters in unexpected ways.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*
  • endgame-*

Severity: low

Risk score: 21

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
  • Use Case: Threat Detection
  • Tactic: Privilege Escalation
  • Tactic: Credential Access
  • Data Source: Elastic Endgame
  • Data Source: Elastic Defend

Version: 4

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "linux" and event.action in ("exec", "exec_event") and event.type == "start" and
process.name in ("chown", "chmod") and process.args == "-R" and process.args : "--reference=*"

Framework: MITRE ATT&CKTM