IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
File Permission Modification in Writable Directory
editFile Permission Modification in Writable Directory
editIdentifies file permission modifications in common writable directories by a non-root user. Adversaries often drop files or payloads into a writable directory and change permissions prior to execution.
Rule type: query
Rule indices:
- auditbeat-*
- 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:
- Elastic
- Host
- Linux
- Threat Detection
- Defense Evasion
Version: 101
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editevent.category:process and event.type:(start or process_started) and process.name:(chmod or chown or chattr or chgrp) and process.working_directory:(/tmp or /var/tmp or /dev/shm) and not user.name:root
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/