Empire Monkey

Detects EmpireMonkey APT reported Activity

Rule Content

- action: global
  title: Empire Monkey
  id: 10152a7b-b566-438f-a33c-390b607d1c8d
  description: Detects EmpireMonkey APT reported Activity
  references:
  - https://app.any.run/tasks/a4107649-8cb0-41af-ad75-113152d4d57b
  tags:
  - attack.t1086
  - attack.execution
  date: 2019/04/02
  author: Markus Neis
  detection:
    condition: 1 of them
  falsepositives:
  - Very Unlikely
  level: critical
- logsource:
    category: process_creation
    product: windows
  detection:
    selection_cutil:
      CommandLine:
      - '*/i:%APPDATA%\logs.txt scrobj.dll'
      Image:
      - '*\cutil.exe'
    selection_regsvr32:
      CommandLine:
      - '*/i:%APPDATA%\logs.txt scrobj.dll'
      Description:
      - Microsoft(C) Registerserver

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='(process_command_line.keyword:(*\/i\:%APPDATA%\\logs.txt\ scrobj.dll) AND (process_path.keyword:(*\\cutil.exe) OR file_description:("Microsoft\(C\)\ Registerserver")))')
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()