windows_dir_piped_to_findstr_activity.yml

name: Windows Dir Piped to Findstr Activity
id: 43cd7a59-3d52-4969-a01a-d677630b1426
version: 1
creation_date: '2026-07-30'
modification_date: '2026-07-30'
author: Raven Tait, Splunk
status: production
type: Anomaly
description: The following analytic detects the execution of the `dir` command piped to `findstr` on Windows systems. This technique is commonly used by attackers during the reconnaissance phase to enumerate files, directories, or sensitive data by filtering directory listings for specific strings or patterns. While this command combination can have legitimate administrative uses, adversaries frequently leverage it to locate credentials, configuration files, or other high-value targets on a compromised system. If confirmed malicious, this activity could indicate an attacker is actively mapping the file system in preparation for data exfiltration, lateral movement, or further exploitation.
data_source:
    - Sysmon EventID 1
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process="*dir*|*findstr*" by Processes.process Processes.vendor_product Processes.user_id Processes.process_hash Processes.parent_process_name Processes.parent_process_exec Processes.action Processes.dest Processes.process_current_directory Processes.process_path Processes.process_integrity_level Processes.original_file_name Processes.parent_process Processes.parent_process_path Processes.parent_process_guid Processes.parent_process_id Processes.process_guid Processes.process_id Processes.user Processes.process_name | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`| `windows_dir_piped_to_findstr_activity_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: Legitimate administrative tasks and scripts may use `dir` piped to `findstr` for routine file searches. Filter based on known user behavior and approved administrative activity.
drilldown_searches:
    - earliest_offset: $info_min_time$
      latest_offset: $info_max_time$
      name: View the detection results for - "$user$" and "$dest$"
      search: '%original_detection_search% | search  user = "$user$" dest = "$dest$"'
    - name: View risk events for the last 7 days for - "$user$" and "$dest$"
      search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$", "$dest$") | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
      earliest_offset: 7d
      latest_offset: '0'
intermediate_findings:
    entities:
        - field: dest
          type: system
          score: 20
          message: Suspicious findstr Activity by $user$ on $dest$ via $process_name$.
        - field: user
          type: user
          score: 20
          message: Suspicious findstr Activity by $user$ on $dest$ via $process_name$.
threat_objects:
    - field: parent_process_name
      type: parent_process_name
    - field: process_name
      type: process_name
analytic_story:
    - Suspicious Command-Line Executions
    - Windows Discovery Techniques
    - Active Directory Discovery
asset_type: Endpoint
mitre_attack_id:
    - T1119
product:
    - Splunk Enterprise
    - Splunk Enterprise Security
    - Splunk Cloud
category: endpoint
security_domain: endpoint
tests:
    - name: True Positive Test
      test_type: unit
      attack_data:
        - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1119/windows_dir_piped_to_findstr_activity/snapattack_windows.log
          source: XmlWinEventLog:Security
          sourcetype: XmlWinEventLog