GitHub Repo

Sharepoint Webshell

Date: 2025-07-20 ID: cb9b2601-efc9-11eb-926b-550bf0943fbb Author: Michael Haag, Splunk Environment: attack_range Directory: sharepoint_webshell

Description

Generation of attack data related to CVE-2025-53770 (ToolShell) showing file creation of the malicious spinstall0.aspx web shell in SharePoint layouts directories.

MITRE ATT&CK Techniques

ID Technique Tactic
T1505.003 Web Shell Persistence

Environment Details

Field Value
Environment attack_range
Directory sharepoint_webshell
Test Date 2025-07-20

Datasets

The following datasets were collected during this attack simulation:

Sysmon

  • Path: /datasets/attack_techniques/T1505.003/sharepoint_webshell/sysmon_spinstall0.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

The following detections in our security content repository use this attack data for testing:

Detection Name Type Source MITRE ATT&CK Analytic Story
Windows SharePoint Spinstall0 Webshell File Creation TTP Endpoint T1190, T1505.003 Microsoft SharePoint Vulnerabilities

Usage Instructions

Replay with Splunk Attack Data

Replay attack data with replay.py from Splunk Attack Data.

1python replay.py --dataset /datasets/attack_techniques/T1505.003/sharepoint_webshell/sysmon_spinstall0.log --index attack_data

Manual Import

  1. Download the dataset files from the paths listed above
  2. Configure your Splunk instance with the appropriate sourcetypes
  3. Import the logs using the Splunk Add Data wizard

Related Content

Find more detections and analytics for this attack technique in our security content repository.

Source: GitHub | Version: 1.0