Adding Hidden File Attribute via Attrib

Adversaries can add the hidden attribute to files to hide them from the user in an attempt to evade detection.

Rule type: eql

Rule indices:

Severity: low

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

Version: 9 (version history)

Added (Elastic Stack release): 7.6.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic

Rule license: Elastic License v2

process where event.type in ("start", "process_started") and
process.name : "attrib.exe" and process.args : "+h"

Framework: MITRE ATT&CK^TM

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/
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/

Version 9 (7.13.0 release)

Updated query, changed from:

event.category:process and event.type:(start or process_started) and
process.name:attrib.exe and process.args:+h

Version 8 (7.12.0 release)

Version 7 (7.11.2 release)

Version 6 (7.11.0 release)

Version 5 (7.10.0 release)

Version 4 (7.9.1 release)

Version 3 (7.9.0 release)

Updated query, changed from:

event.action:"Process Create (rule: ProcessCreate)" and
process.name:attrib.exe and process.args:+h

Version 2 (7.7.0 release)

Updated query, changed from:

event.action:"Process Create (rule: ProcessCreate)" and
process.name:"attrib.exe" and process.args:"+h"