OCI - Inbound SSH connection

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Id	eb6e07a1-2895-4c55-9c27-ac84294f0e46
Rulename	OCI - Inbound SSH connection
Description	Detects inbound SSH connection.
Severity	Medium
Tactics	InitialAccess
Techniques	T1190
Required data connectors	OracleCloudInfrastructureLogsConnector
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/Oracle Cloud Infrastructure/Analytic Rules/OCIInboundSSHConnection.yaml
Version	1.0.0
Arm template	eb6e07a1-2895-4c55-9c27-ac84294f0e46.json

KQL

OCILogs
| where EventType contains 'vcn.flowlogs'
| where data_action_s =~ 'ACCEPT'
| where ipv4_is_private(DstIpAddr)
| where ipv4_is_private(SrcIpAddr) == False
| where DstPortNumber == 22
| extend IPCustomEntity = DstIpAddr

YAML

triggerThreshold: 0
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
requiredDataConnectors:
- dataTypes:
  - OCILogs
  connectorId: OracleCloudInfrastructureLogsConnector
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Oracle Cloud Infrastructure/Analytic Rules/OCIInboundSSHConnection.yaml
name: OCI - Inbound SSH connection
relevantTechniques:
- T1190
status: Available
version: 1.0.0
queryPeriod: 1h
kind: Scheduled
id: eb6e07a1-2895-4c55-9c27-ac84294f0e46
query: |
  OCILogs
  | where EventType contains 'vcn.flowlogs'
  | where data_action_s =~ 'ACCEPT'
  | where ipv4_is_private(DstIpAddr)
  | where ipv4_is_private(SrcIpAddr) == False
  | where DstPortNumber == 22
  | extend IPCustomEntity = DstIpAddr  
description: |
    'Detects inbound SSH connection.'
queryFrequency: 1h
severity: Medium
triggerOperator: gt
tactics:
- InitialAccess

ARM