Access Control List Modification via setfacl
editAccess Control List Modification via setfacl
editThis rule detects Linux Access Control List (ACL) modification via the setfacl command.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- endgame-*
- auditbeat-*
- logs-auditd_manager.auditd-*
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: Defense Evasion
- Data Source: Elastic Defend
- Data Source: Elastic Endgame
- Data Source: Auditd Manager
Version: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editprocess where host.os.type == "linux" and event.type == "start" and
event.action in ("exec", "exec_event", "executed", "process_started") and
process.name == "setfacl" and not (
process.command_line == "/bin/setfacl --restore=-" or
process.args == "/var/log/journal/"
)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: File and Directory Permissions Modification
- ID: T1222
- Reference URL: https://attack.mitre.org/techniques/T1222/
-
Sub-technique:
- Name: Linux and Mac File and Directory Permissions Modification
- ID: T1222.002
- Reference URL: https://attack.mitre.org/techniques/T1222/002/