- title: PowerShell ShellCode
id: 16b37b70-6fcf-4814-a092-c36bd3aafcbd
status: experimental
description: Detects Base64 encoded Shellcode
references:
- https://twitter.com/cyb3rops/status/1063072865992523776
tags:
- attack.privilege_escalation
- attack.execution
- attack.t1055
- attack.t1086
author: David Ledbetter (shellcode), Florian Roth (rule)
date: 2018/11/17
logsource:
product: windows
service: powershell
description: Script block logging must be enabled
category: null
detection:
selection:
EventID: 4104
keyword1:
- '*AAAAYInlM*'
keyword2:
- '*OiCAAAAYInlM*'
- '*OiJAAAAYInlM*'
condition: selection and keyword1 and keyword2
falsepositives:
- Unknown
level: critical
In [ ]:
from elasticsearch import Elasticsearch
from elasticsearch_dsl import Search
import pandas as pd
In [ ]:
es = Elasticsearch(['http://helk-elasticsearch:9200'])
searchContext = Search(using=es, index='logs-endpoint-winevent-powershell-*', doc_type='doc')
In [ ]:
s = searchContext.query('query_string', query='((event_id:"4104" AND "*AAAAYInlM*") AND \*.keyword:(*OiCAAAAYInlM* OR *OiJAAAAYInlM*))')
response = s.execute()
if response.success():
df = pd.DataFrame((d.to_dict() for d in s.scan()))
In [ ]:
df.head()