web_spring4shell_http_request_class_module.yml

name: Web Spring4Shell HTTP Request Class Module
id: fcdfd69d-0ca3-4476-920e-9b633cb4593e
version: 4
date: '2024-11-15'
author: Michael Haag, Splunk
status: production
type: TTP
description: The following analytic detects HTTP requests containing payloads related
  to the Spring4Shell vulnerability (CVE-2022-22965). It leverages Splunk Stream HTTP
  data to inspect the HTTP request body and form data for specific fields such as
  "class.module.classLoader.resources.context.parent.pipeline.first". This activity
  is significant as it indicates an attempt to exploit a critical vulnerability in
  Spring Framework, potentially leading to remote code execution. If confirmed malicious,
  this could allow attackers to gain unauthorized access, execute arbitrary code,
  and compromise the affected system.
data_source:
- Splunk Stream HTTP
search: '`stream_http` http_method IN ("POST") | stats values(form_data) as http_request_body
  min(_time) as firstTime max(_time) as lastTime count by src dest http_method http_user_agent
  uri_path url bytes_in bytes_out | search http_request_body IN ("*class.module.classLoader.resources.context.parent.pipeline.first.fileDateFormat=_*",
  "*class.module.classLoader.resources.context.parent.pipeline.first.pattern*","*suffix=.jsp*")
  | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `web_spring4shell_http_request_class_module_filter`'
how_to_implement: To successfully implement this search, you need to be ingesting
  logs with the stream HTTP logs or network logs that catch network traffic. Make
  sure that the http-request-body, payload, or request field is enabled.
known_false_positives: False positives may occur and filtering may be required. Restrict
  analytic to asset type.
references:
- https://github.com/DDuarte/springshell-rce-poc/blob/master/poc.py
drilldown_searches:
- name: View the detection results for - "$dest$"
  search: '%original_detection_search% | search  dest = "$dest$"'
  earliest_offset: $info_min_time$
  latest_offset: $info_max_time$
- name: View risk events for the last 7 days for - "$dest$"
  search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
    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: A http body request related to Spring4Shell has been sent to $dest$ by
    $src$.
  risk_objects:
  - field: dest
    type: system
    score: 72
  threat_objects:
  - field: src
    type: ip_address
tags:
  analytic_story:
  - Spring4Shell CVE-2022-22965
  asset_type: Web Server
  cve:
  - CVE-2022-22965
  mitre_attack_id:
  - T1190
  - T1133
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  security_domain: network
tests:
- name: True Positive Test
  attack_data:
  - data: 
      https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1190/spring4shell/http_request_body_streams.log
    source: stream:http
    sourcetype: stream:http