ProofpointPOD - Weak ciphers

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Id	56b0a0cd-894e-4b38-a0a1-c41d9f96649a
Rulename	ProofpointPOD - Weak ciphers
Description	Detects when weak TLS ciphers are used.
Severity	Low
Tactics	CommandAndControl
Techniques	T1573
Required data connectors	ProofpointPOD
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/Proofpoint On demand(POD) Email Security/Analytic Rules/ProofpointPODWeakCiphers.yaml
Version	1.0.3
Arm template	56b0a0cd-894e-4b38-a0a1-c41d9f96649a.json

KQL

let lbtime = 1h;
let tls_ciphers = dynamic(['RC4-SHA', 'DES-CBC3-SHA']);
ProofpointPOD
| where EventType == 'message'
| where TlsCipher in (tls_ciphers)
| extend IPCustomEntity = SrcIpAddr

YAML

relevantTechniques:
- T1573
queryPeriod: 1h
triggerOperator: gt
version: 1.0.3
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Proofpoint On demand(POD) Email Security/Analytic Rules/ProofpointPODWeakCiphers.yaml
description: |
    'Detects when weak TLS ciphers are used.'
tactics:
- CommandAndControl
severity: Low
status: Available
kind: Scheduled
triggerThreshold: 0
queryFrequency: 1h
requiredDataConnectors:
- dataTypes:
  - ProofpointPOD_message_CL
  connectorId: ProofpointPOD
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
id: 56b0a0cd-894e-4b38-a0a1-c41d9f96649a
query: |
  let lbtime = 1h;
  let tls_ciphers = dynamic(['RC4-SHA', 'DES-CBC3-SHA']);
  ProofpointPOD
  | where EventType == 'message'
  | where TlsCipher in (tls_ciphers)
  | extend IPCustomEntity = SrcIpAddr  
name: ProofpointPOD - Weak ciphers

ARM