Zscaler - ZPA connections from new IP

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Id	24f0779d-3927-403a-aac1-cc8791653606
Rulename	Zscaler - ZPA connections from new IP
Description	Detects ZPA connections from new IP.
Severity	Medium
Tactics	InitialAccess
Techniques	T1078 T1133
Required data connectors	CustomLogsAma
Kind	Scheduled
Query frequency	1h
Query period	14d
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Zscaler Private Access (ZPA)/Analytic Rules/ZscalerZPAConnectionsFromNewIP.yaml
Version	1.0.2
Arm template	24f0779d-3927-403a-aac1-cc8791653606.json

KQL

let listIPs =
ZPAEvent 
| where TimeGenerated > ago(14d)
| where DvcAction == 'open'
| summarize ListofIPs = make_set(SrcIpAddr) by DstUserName
| project ListofIPs;
ZPAEvent
| where isnotempty(SrcIpAddr)
| where SrcIpAddr !in (listIPs)
| summarize EventCount = count() by DstUserName, SrcIpAddr
| project-away EventCount
| extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName

YAML

name: Zscaler - ZPA connections from new IP
query: |
  let listIPs =
  ZPAEvent 
  | where TimeGenerated > ago(14d)
  | where DvcAction == 'open'
  | summarize ListofIPs = make_set(SrcIpAddr) by DstUserName
  | project ListofIPs;
  ZPAEvent
  | where isnotempty(SrcIpAddr)
  | where SrcIpAddr !in (listIPs)
  | summarize EventCount = count() by DstUserName, SrcIpAddr
  | project-away EventCount
  | extend IPCustomEntity = SrcIpAddr, AccountCustomEntity = DstUserName  
queryFrequency: 1h
triggerOperator: gt
requiredDataConnectors:
- datatypes:
  - ZPA_CL
  connectorId: CustomLogsAma
status: Available
entityMappings:
- entityType: Account
  fieldMappings:
  - identifier: Name
    columnName: AccountCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
triggerThreshold: 0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Zscaler Private Access (ZPA)/Analytic Rules/ZscalerZPAConnectionsFromNewIP.yaml
description: |
    'Detects ZPA connections from new IP.'
version: 1.0.2
id: 24f0779d-3927-403a-aac1-cc8791653606
kind: Scheduled
relevantTechniques:
- T1078
- T1133
severity: Medium
tactics:
- InitialAccess
queryPeriod: 14d

ARM