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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Potential Disabling of AppArmor

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Potential Disabling of AppArmor

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This rule monitors for potential attempts to disable AppArmor. AppArmor is a Linux security module that enforces fine-grained access control policies to restrict the actions and resources that specific applications and processes can access. Adversaries may disable security tools to avoid possible detection of their tools and activities.

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: 2

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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process where host.os.type == "linux" and event.action == "exec" and event.type == "start" and (
  (process.name == "systemctl" and process.args == "disable" and process.args == "apparmor") or
  (process.name == "ln" and process.args : "/etc/apparmor.d/*" and process.args : "/etc/apparmor.d/disable/")
)

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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