PaloAlto - File type changed

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Id	9150ad68-51c8-11ec-bf63-0242ac130002
Rulename	PaloAlto - File type changed
Description	Detects when file type changed.
Severity	Medium
Tactics	InitialAccess
Techniques	T1190 T1133
Required data connectors	CefAma
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/PaloAltoCDL/Analytic Rules/PaloAltoCDLFileTypeWasChanged.yaml
Version	1.0.3
Arm template	9150ad68-51c8-11ec-bf63-0242ac130002.json

KQL

PaloAltoCDLEvent
| where EventResourceId =~ 'THREAT'
| where EventResult =~ 'file'
| where FileType != OldFileType
| extend FileCustomEntity = SrcFileName, AccountCustomEntity = DstUsername

YAML

name: PaloAlto - File type changed
id: 9150ad68-51c8-11ec-bf63-0242ac130002
description: |
    'Detects when file type changed.'
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
- fieldMappings:
  - columnName: FileCustomEntity
    identifier: Name
  entityType: File
version: 1.0.3
triggerOperator: gt
query: |
  PaloAltoCDLEvent
  | where EventResourceId =~ 'THREAT'
  | where EventResult =~ 'file'
  | where FileType != OldFileType
  | extend FileCustomEntity = SrcFileName, AccountCustomEntity = DstUsername  
tactics:
- InitialAccess
kind: Scheduled
queryFrequency: 1h
severity: Medium
queryPeriod: 1h
requiredDataConnectors:
- dataTypes:
  - CommonSecurityLog
  connectorId: CefAma
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PaloAltoCDL/Analytic Rules/PaloAltoCDLFileTypeWasChanged.yaml
relevantTechniques:
- T1190
- T1133

ARM