splunk_escuTTP

Windows Multiple Accounts Deleted

The following analytic detects the deletion of more than five unique Windows accounts within a 10-minute period, using Event Code 4726 from the Windows Security Event Log. It leverages the `wineventlog_security` dataset, segmenting data into 10-minute intervals to identify suspicious account deletions. This activity is significant as it may indicate an attacker attempting to erase traces of their actions. If confirmed malicious, this could lead to unauthorized access removal, hindering incident response and forensic investigations.

MITRE ATT&CK

T1098 T1078

Detection Query

`wineventlog_security` EventCode=4726 status=success
  | bucket span=10m _time
  | stats count dc(user) as unique_users values(user) as user values(dest) as dest
    BY EventCode signature _time
       src_user SubjectDomainName TargetDomainName
       Logon_ID
  | where unique_users > 5
  | `windows_multiple_accounts_deleted_filter`

Author

Mauricio Velazco, Splunk

Created

2026-03-10

Data Sources

Windows Event Log Security 4726

References

https://attack.mitre.org/techniques/T1098/

Tags

Azure Active Directory Persistence

Raw Content

name: Windows Multiple Accounts Deleted
id: 49c0d4d6-c55d-4d3a-b3d5-7709fafed70d
version: 9
date: '2026-03-10'
author: Mauricio Velazco, Splunk
data_source:
    - Windows Event Log Security 4726
type: TTP
status: production
description: The following analytic detects the deletion of more than five unique Windows accounts within a 10-minute period, using Event Code 4726 from the Windows Security Event Log. It leverages the `wineventlog_security` dataset, segmenting data into 10-minute intervals to identify suspicious account deletions. This activity is significant as it may indicate an attacker attempting to erase traces of their actions. If confirmed malicious, this could lead to unauthorized access removal, hindering incident response and forensic investigations.
search: |-
    `wineventlog_security` EventCode=4726 status=success
      | bucket span=10m _time
      | stats count dc(user) as unique_users values(user) as user values(dest) as dest
        BY EventCode signature _time
           src_user SubjectDomainName TargetDomainName
           Logon_ID
      | where unique_users > 5
      | `windows_multiple_accounts_deleted_filter`
how_to_implement: To successfully implement this search, you need to be ingesting Domain Controller events with the Windows TA. The Advanced Security Audit policy setting `Audit User Account Management` within `Account Management` needs to be enabled.
known_false_positives: Service accounts may be responsible for the creation, deletion or modification of accounts for legitimate purposes. Filter as needed.
references:
    - https://attack.mitre.org/techniques/T1098/
drilldown_searches:
    - name: View the detection results for - "$src_user$"
      search: '%original_detection_search% | search  src_user = "$src_user$"'
      earliest_offset: $info_min_time$
      latest_offset: $info_max_time$
    - name: View risk events for the last 7 days for - "$src_user$"
      search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$src_user$") starthoursago=168  | 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: $info_min_time$
      latest_offset: $info_max_time$
rba:
    message: User $src_user$ deleted multiple accounts in a short period of time.
    risk_objects:
        - field: src_user
          type: user
          score: 50
    threat_objects: []
tags:
    analytic_story:
        - Azure Active Directory Persistence
    asset_type: Endpoint
    mitre_attack_id:
        - T1098
        - T1078
    product:
        - Splunk Enterprise
        - Splunk Enterprise Security
        - Splunk Cloud
    security_domain: endpoint
tests:
    - name: True Positive Test
      attack_data:
        - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1098/windows_multiple_accounts_deleted/windows_multiple_accounts_deleted.log
          source: XmlWinEventLog:Security
          sourcetype: XmlWinEventLog