Ping Federate - Password reset request from unexpected source IP address

let known_src = 
PingFederateEvent
| where TimeGenerated between (ago(14d) .. (1d))
| where isnotempty(SrcIpAddr)
| summarize makeset(SrcIpAddr);
PingFederateEvent
| where EventType =~ 'PWD_RESET_REQUEST'
| where isnotempty(SrcIpAddr)
| where SrcIpAddr !in (known_src)
| extend AccountCustomEntity = DstUserName
| extend IpCustomEntity = SrcIpAddr

query: |
  let known_src = 
  PingFederateEvent
  | where TimeGenerated between (ago(14d) .. (1d))
  | where isnotempty(SrcIpAddr)
  | summarize makeset(SrcIpAddr);
  PingFederateEvent
  | where EventType =~ 'PWD_RESET_REQUEST'
  | where isnotempty(SrcIpAddr)
  | where SrcIpAddr !in (known_src)
  | extend AccountCustomEntity = DstUserName
  | extend IpCustomEntity = SrcIpAddr  
version: 1.0.3
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PingFederate/Analytic Rules/PingFederatePasswordRstReqUnexpectedSource.yaml
status: Available
description: |
    'Detects password reset requests from unexpected source IP address.'
queryFrequency: 1h
name: Ping Federate - Password reset request from unexpected source IP address..
kind: Scheduled
triggerThreshold: 0
id: 2d201d21-77b4-4d97-95f3-26b5c6bde09f
requiredDataConnectors:
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
severity: Medium
queryPeriod: 14d
entityMappings:
- fieldMappings:
  - columnName: AccountCustomEntity
    identifier: Name
  entityType: Account
- fieldMappings:
  - columnName: IpCustomEntity
    identifier: Address
  entityType: IP
relevantTechniques:
- T1078
tactics:
- InitialAccess