name: Sdelete Application Execution
id: 31702fc0-2682-11ec-85c3-acde48001122
version: 1
date: '2021-10-06'
author: Teoderick Contreras, Splunk
type: TTP
datamodel:
- Endpoint
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.
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: To successfully implement this search you need to be ingesting information
  on process that include the name of the process responsible for the changes from
  your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
  confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
  endpoint product.
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
  confidence: 70
  context:
  - Source:Endpoint
  - Stage:Execution
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1485/sdelete/sysmon.log
  impact: 70
  kill_chain_phases:
  - Exploitation
  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
  supported_tas:
  - Splunk_TA_microsoft_sysmon
  asset_type: Endpoint