name: Sdelete Application Execution
id: 31702fc0-2682-11ec-85c3-acde48001122
version: 1
date: '2021-10-06'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This analytic is to detect the execution of sdelete.exe application sysinternal
  tools. This tool is one of the most use tool of malware and adversaries to remove
  or clear their tracks and artifact in the targetted host. This tool is designed
  to delete securely a file in file system that remove the forensic evidence on the
  machine. A good TTP query to check why user execute this application which is not
  a common practice.
data_source:
- Sysmon Event ID 1
search: '| tstats `security_content_summariesonly` values(Processes.process) as process
  values(Processes.parent_process) as parent_process values(Processes.process_id)
  as process_id count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes
  where `process_sdelete` by  Processes.process_name Processes.original_file_name
  Processes.dest Processes.user Processes.parent_process_name Processes.parent_process
  | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
  | `sdelete_application_execution_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: user may execute and use this application
references:
- https://app.any.run/tasks/956f50be-2c13-465a-ac00-6224c14c5f89/
tags:
  analytic_story:
  - Masquerading - Rename System Utilities
  asset_type: Endpoint
  confidence: 70
  impact: 70
  message: sdelete process $process_name$ executed in $dest$
  mitre_attack_id:
  - T1485
  - T1070.004
  - T1070
  observable:
  - name: dest
    type: Endpoint
    role:
    - Victim
  - name: user
    type: User
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.dest
  - Processes.user
  - Processes.parent_process_name
  - Processes.parent_process
  - Processes.original_file_name
  - Processes.process_name
  - Processes.process
  - Processes.process_id
  - Processes.parent_process_path
  - Processes.process_path
  - Processes.parent_process_id
  risk_score: 49
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1485/sdelete/sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog