Digital Guardian - Exfiltration using DNS protocol

Back


Id	39e25deb-49bb-4cdb-89c1-c466d596e2bd
Rulename	Digital Guardian - Exfiltration using DNS protocol
Description	Detects exfiltration using DNS protocol.
Severity	High
Tactics	Exfiltration
Techniques	T1048
Required data connectors	SyslogAma
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/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianExfiltrationOverDNS.yaml
Version	1.0.2
Arm template	39e25deb-49bb-4cdb-89c1-c466d596e2bd.json

KQL

DigitalGuardianDLPEvent
| where DstPortNumber == 53
| extend AccountCustomEntity = SrcUserName

YAML

name: Digital Guardian - Exfiltration using DNS protocol
query: |
  DigitalGuardianDLPEvent
  | where DstPortNumber == 53
  | extend AccountCustomEntity = SrcUserName  
entityMappings:
- entityType: Account
  fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
queryPeriod: 1h
version: 1.0.2
tactics:
- Exfiltration
triggerOperator: gt
kind: Scheduled
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Digital Guardian Data Loss Prevention/Analytic Rules/DigitalGuardianExfiltrationOverDNS.yaml
relevantTechniques:
- T1048
id: 39e25deb-49bb-4cdb-89c1-c466d596e2bd
severity: High
requiredDataConnectors:
- connectorId: SyslogAma
  datatypes:
  - Syslog
status: Available
description: |
    'Detects exfiltration using DNS protocol.'
queryFrequency: 1h

ARM