Spring framework exceptions

Detects suspicious Spring framework exceptions that could indicate exploitation attempts

Rule Content

- title: Spring framework exceptions
  id: ae48ab93-45f7-4051-9dfe-5d30a3f78e33
  description: Detects suspicious Spring framework exceptions that could indicate
    exploitation attempts
  author: Thomas Patzke
  references:
  - https://docs.spring.io/spring-security/site/docs/current/apidocs/overview-tree.html
  logsource:
    category: application
    product: spring
    service: null
  detection:
    keywords:
    - AccessDeniedException
    - CsrfException
    - InvalidCsrfTokenException
    - MissingCsrfTokenException
    - CookieTheftException
    - InvalidCookieException
    - RequestRejectedException
    condition: keywords
  falsepositives:
  - Application bugs
  - Penetration testing
  level: medium

Querying Elasticsearch

Import Libraries



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from elasticsearch import Elasticsearch
from elasticsearch_dsl import Search
import pandas as pd

Initialize Elasticsearch client



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es = Elasticsearch(['http://helk-elasticsearch:9200'])
searchContext = Search(using=es, index='logs-*', doc_type='doc')

Run Elasticsearch Query



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s = searchContext.query('query_string', query='\*.keyword:(*AccessDeniedException* OR *CsrfException* OR *InvalidCsrfTokenException* OR *MissingCsrfTokenException* OR *CookieTheftException* OR *InvalidCookieException* OR *RequestRejectedException*)')
response = s.execute()
if response.success():
    df = pd.DataFrame((d.to_dict() for d in s.scan()))

Show Results



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df.head()