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Adding Hidden File Attribute via Attrib

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Adding Hidden File Attribute via Attrib

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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:

winlogbeat-*
logs-endpoint.events.*
logs-windows.*
endgame-*

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
Windows
Threat Detection
Defense Evasion
Elastic Endgame

Version: 105

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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process where host.os.type == "windows" and event.type == "start" and
  (process.name : "attrib.exe" or process.pe.original_file_name == "ATTRIB.EXE") and process.args : "+h" and
  not
  (process.parent.name: "cmd.exe" and
    process.command_line: "attrib  +R +H +S +A *.cui" and
    process.parent.command_line: "?:\\WINDOWS\\system32\\cmd.exe /c \"?:\\WINDOWS\\system32\\*.bat\"")

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/
Sub-technique:
- Name: Hidden Files and Directories
- ID: T1564.001
- Reference URL: https://attack.mitre.org/techniques/T1564/001/
Tactic:
- Name: Persistence
- ID: TA0003
- Reference URL: https://attack.mitre.org/tactics/TA0003/

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