Telegram Bot API Request

Detects suspicious DNS queries to api.telegram.org used by Telegram Bots of any kind

Rule Content

- title: Telegram Bot API Request
  id: c64c5175-5189-431b-a55e-6d9882158251
  status: experimental
  description: Detects suspicious DNS queries to api.telegram.org used by Telegram
    Bots of any kind
  references:
  - https://core.telegram.org/bots/faq
  - https://researchcenter.paloaltonetworks.com/2018/03/unit42-telerat-another-android-trojan-leveraging-telegrams-bot-api-to-target-iranian-users/
  - https://blog.malwarebytes.com/threat-analysis/2016/11/telecrypt-the-ransomware-abusing-telegram-api-defeated/
  - https://www.welivesecurity.com/2016/12/13/rise-telebots-analyzing-disruptive-killdisk-attacks/
  author: Florian Roth
  date: 2018/06/05
  logsource:
    category: dns
    product: null
    service: null
  detection:
    selection:
      query:
      - api.telegram.org
    condition: selection
  falsepositives:
  - Legitimate use of Telegram bots in the company
  level: medium

Querying Elasticsearch

Import Libraries



In [ ]:

    
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



In [ ]:

    
s = searchContext.query('query_string', query='query:("api.telegram.org")')
response = s.execute()
if response.success():
    df = pd.DataFrame((d.to_dict() for d in s.scan()))

Show Results



In [ ]:

    
df.head()