hiding_files_and_directories_with_attrib_exe.yml

name: Hiding Files And Directories With Attrib exe
id: 6e5a3ae4-90a3-462d-9aa6-0119f638c0f1
version: 5
date: '2024-01-01'
author: Bhavin Patel, Splunk
status: production
type: TTP
description: Attackers leverage an existing Windows binary, attrib.exe, to mark specific
  as hidden by using specific flags so that the victim does not see the file.  The
  search looks for specific command-line arguments to detect the use of attrib.exe
  to hide files.
data_source:
- Sysmon EventID 1
search: '| tstats `security_content_summariesonly` count min(_time) values(Processes.process)
  as process max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name=attrib.exe
  (Processes.process=*+h*) by Processes.parent_process_name Processes.process_name Processes.user
  Processes.dest | `drop_dm_object_name("Processes")` | `security_content_ctime(firstTime)`|`security_content_ctime(lastTime)`|
  `hiding_files_and_directories_with_attrib_exe_filter` '
how_to_implement: The detection is based on data that originates from Endpoint Detection
  and Response (EDR) agents. These agents are designed to provide security-related
  telemetry from the endpoints where the agent is installed. To implement this search,
  you must ingest logs that contain the process GUID, process name, and parent process.
  Additionally, you must ingest complete command-line executions. These logs must
  be processed using the appropriate Splunk Technology Add-ons that are specific to
  the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
  data model. Use the Splunk Common Information Model (CIM) to normalize the field
  names and speed up the data modeling process.
known_false_positives: 'Some applications and users may legitimately use attrib.exe
  to interact with the files.'
references: []
tags:
  analytic_story:
  - Windows Defense Evasion Tactics
  - Windows Persistence Techniques
  - Azorult
  asset_type: Endpoint
  confidence: 80
  impact: 90
  message: Attrib.exe with +h flag to hide files on $dest$ executed by $user$ is detected.
  mitre_attack_id:
  - T1222
  - T1222.001
  observable:
  - name: user
    type: User
    role:
    - Victim
  - name: dest
    type: Endpoint
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.process
  - Processes.process_name
  - Processes.parent_process
  - Processes.user
  - Processes.dest
  risk_score: 72
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1222.001/atomic_red_team/windows-sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog