Relevant Anti-Virus Event

This detection method points out highly relevant Antivirus events

Rule Content

- title: Relevant Anti-Virus Event
  id: 78bc5783-81d9-4d73-ac97-59f6db4f72a8
  description: This detection method points out highly relevant Antivirus events
  author: Florian Roth
  logsource:
    product: windows
    service: application
    category: null
  detection:
    keywords:
      Message:
      - '*HTool*'
      - '*Hacktool*'
      - '*ASP/Backdoor*'
      - '*JSP/Backdoor*'
      - '*PHP/Backdoor*'
      - '*Backdoor.ASP*'
      - '*Backdoor.JSP*'
      - '*Backdoor.PHP*'
      - '*Webshell*'
      - '*Portscan*'
      - '*Mimikatz*'
      - '*WinCred*'
      - '*PlugX*'
      - '*Korplug*'
      - '*Pwdump*'
      - '*Chopper*'
      - '*WmiExec*'
      - '*Xscan*'
      - '*Clearlog*'
      - '*ASPXSpy*'
    filters:
      Message:
      - '*Keygen*'
      - '*Crack*'
    condition: keywords and not 1 of filters
  falsepositives:
  - Some software piracy tools (key generators, cracks) are classified as hack tools
  level: high

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-endpoint-winevent-application-*', doc_type='doc')

Run Elasticsearch Query



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s = searchContext.query('query_string', query='(Message.keyword:(*HTool* OR *Hacktool* OR *ASP\/Backdoor* OR *JSP\/Backdoor* OR *PHP\/Backdoor* OR *Backdoor.ASP* OR *Backdoor.JSP* OR *Backdoor.PHP* OR *Webshell* OR *Portscan* OR *Mimikatz* OR *WinCred* OR *PlugX* OR *Korplug* OR *Pwdump* OR *Chopper* OR *WmiExec* OR *Xscan* OR *Clearlog* OR *ASPXSpy*) AND (NOT (Message.keyword:(*Keygen* OR *Crack*))))')
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()