Corelight - Forced External Outbound SMB

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Id	73f23aa2-5cc4-4507-940b-75c9092e9e01
Rulename	Corelight - Forced External Outbound SMB
Description	Detects SMB requests that originate internally and communicate with an external IP address.
Severity	Medium
Tactics	CredentialAccess
Techniques	T1187
Required data connectors	Corelight
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightForcedExternalOutboundSMB.yaml
Version	2.1.0
Arm template	73f23aa2-5cc4-4507-940b-75c9092e9e01.json

KQL

union corelight_conn, corelight_conn_red
| where local_orig == true
| where local_resp == false
| where history hasprefix 'Sh' and service hasprefix 'smb'

YAML

status: Available
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightForcedExternalOutboundSMB.yaml
kind: Scheduled
description: |
    'Detects SMB requests that originate internally and communicate with an external IP address.'
triggerOperator: gt
tactics:
- CredentialAccess
queryPeriod: 1h
triggerThreshold: 0
id: 73f23aa2-5cc4-4507-940b-75c9092e9e01
severity: Medium
requiredDataConnectors:
- connectorId: Corelight
  dataTypes:
  - Corelight_v2_conn
  - Corelight_v2_conn_red
  - corelight_conn
  - corelight_conn_red
version: 2.1.0
query: |
  union corelight_conn, corelight_conn_red
  | where local_orig == true
  | where local_resp == false
  | where history hasprefix 'Sh' and service hasprefix 'smb'  
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: id_orig_h
  entityType: IP
name: Corelight - Forced External Outbound SMB
relevantTechniques:
- T1187

ARM