GitHub Repo

T1505.003

Date: 2025-10-28 ID: cc9b2609-efc9-11eb-926b-550bf0943fbb Author: Michael Haag Environment: attack_range Directory: T1505.003

Description

The following data was produced to emulate IIS, w3wp.exe, spawning shells, simulating web shell activity. In addition, behavior related to Microsoft Exchange Server's Unified Messaging services, umworkerprocess.exe and umservice.exe, spawning a child process. Behaviors are related to vulnerabilities exploited by HAFNIUM Group. The vulnerabilities recently being exploited were CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, and CVE-2021-27065.

MITRE ATT&CK Techniques

ID Technique Tactic
T1505.003 Web Shell Persistence

Environment Details

Field Value
Environment attack_range
Directory T1505.003
Test Date 2025-10-28

Datasets

The following datasets were collected during this attack simulation:

Windows-Sysmon_proxylogon

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

Windows-Sysmon_umservices

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

Windows-Sysmon

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

Moveit_windows-Sysmon

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

Wsus-Windows-Sysmon

  • Path: /datasets/attack_techniques/T1505.003/wsus-windows-sysmon.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

Wsus-Sa-Windows-Sysmon

  • Path: /datasets/attack_techniques/T1505.003/wsus-sa-windows-sysmon.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational

Wsus-Iis

  • Path: /datasets/attack_techniques/T1505.003/wsus-iis.log
  • Sourcetype: iis
  • Source: iis

Wsus-Suricata

  • Path: /datasets/attack_techniques/T1505.003/wsus-suricata.log
  • Sourcetype: suricata
  • Source: suricata

Wsus-7053-Windows-Application

  • Path: /datasets/attack_techniques/T1505.003/wsus-7053-windows-application.log
  • Sourcetype: XmlWinEventLog
  • Source: XmlWinEventLog:Application

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

Detection Name Type Source MITRE ATT&CK Analytic Story
Windows WSUS Spawning Shell TTP Endpoint T1190, T1505.003 Microsoft WSUS CVE-2025-59287
Detect Exchange Web Shell TTP Endpoint T1133, T1190, T1505.003 ProxyNotShell, CISA AA22-257A, HAFNIUM Group, ProxyShell, Compromised Windows Host, BlackByte Ransomware, Seashell Blizzard, GhostRedirector IIS Module and Rungan Backdoor
Windows Suspicious Child Process Spawned From WebServer TTP Endpoint T1505.003 Flax Typhoon, BlackByte Ransomware, CISA AA22-257A, HAFNIUM Group, CISA AA22-264A, ProxyShell, SysAid On-Prem Software CVE-2023-47246 Vulnerability, ProxyNotShell, Medusa Ransomware, WS FTP Server Critical Vulnerabilities, Compromised Windows Host, Citrix ShareFile RCE CVE-2023-24489, Microsoft SharePoint Vulnerabilities, GhostRedirector IIS Module and Rungan Backdoor, Microsoft WSUS CVE-2025-59287
Windows SharePoint Spinstall0 Webshell File Creation TTP Endpoint T1190, T1505.003 Microsoft SharePoint Vulnerabilities
Windows MOVEit Transfer Writing ASPX TTP Endpoint T1190, T1133 MOVEit Transfer Critical Vulnerability, Hellcat Ransomware
W3WP Spawning Shell TTP Deprecated T1505.003 ProxyNotShell, Data Destruction, ProxyShell, Hermetic Wiper, CISA AA22-257A, HAFNIUM Group, BlackByte Ransomware, CISA AA22-264A, Flax Typhoon, WS FTP Server Critical Vulnerabilities, PHP-CGI RCE Attack on Japanese Organizations, Microsoft SharePoint Vulnerabilities, GhostRedirector IIS Module and Rungan Backdoor

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/windows-sysmon_proxylogon.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