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Creation of Hidden Shared Object Fileedit
Identifies the creation of a hidden shared object (.so) file. Users can mark specific files as hidden simply by putting a "." as the first character in the file or folder name. Adversaries can use this to their advantage to hide files and folders on the system for persistence and defense evasion.
Rule type: eql
Rule indices:
- auditbeat-*
- logs-endpoint.events.*
Severity: medium
Risk score: 47
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 33
Tags:
- Elastic
- Host
- Linux
- Threat Detection
- Defense Evasion
Version: 100 (version history)
Added (Elastic Stack release): 8.4.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
file where event.action : "creation" and file.extension == "so" and file.name : ".*.so"
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
-
Technique:
- Name: Hide Artifacts
- ID: T1564
- Reference URL: https://attack.mitre.org/techniques/T1564/
Rule version historyedit
- Version 100 (8.5.0 release)
-
-
Updated query, changed from:
file where event.action : "creation" and file.extension == "so" and file.name : ".*.so"
-