IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Attempt to Disable IPTables or Firewall

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Attempt to Disable IPTables or Firewall

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Adversaries may attempt to disable the iptables or firewall service in an attempt to affect how a host is allowed to receive or send network traffic.

Rule type: eql

Rule indices:

logs-endpoint.events.*

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: None

Tags:

Domain: Endpoint
OS: Linux
Use Case: Threat Detection
Tactic: Defense Evasion
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.type == "start" and event.action == "exec" and
 (
   /* disable FW */
   (
     (process.name == "ufw" and process.args == "disable") or
     (process.name == "iptables" and process.args == "-F" and process.args_count == 2)
   ) or

   /* stop FW service */
   (
     ((process.name == "service" and process.args == "stop") or
       (process.name == "chkconfig" and process.args == "off") or
       (process.name == "systemctl" and process.args in ("disable", "stop", "kill"))) and
    process.args in ("firewalld", "ip6tables", "iptables")
    )
  )

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Impair Defenses
- ID: T1562
- Reference URL: https://attack.mitre.org/techniques/T1562/
Sub-technique:
- Name: Disable or Modify Tools
- ID: T1562.001
- Reference URL: https://attack.mitre.org/techniques/T1562/001/

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