let known_domains =
PingFederateEvent
| where TimeGenerated between (ago(14d) .. (1d))
| extend email = extract(@'email=(.*?),.*', 1, AdditionalExtensions)
| extend m_domain = extract(@'@(.*)', 1, email)
| where isnotempty(m_domain)
| summarize makeset(m_domain);
PingFederateEvent
| extend email = extract(@'email=(.*?),.*', 1, AdditionalExtensions)
| extend m_domain = extract(@'@(.*)', 1, email)
| where isnotempty(m_domain)
| where m_domain !in (known_domains)
| extend AccountCustomEntity = DstUserName
| extend IpCustomEntity = SrcIpAddr
description: |
'Detects unusual mail domain in authentication requests.'
kind: Scheduled
tactics:
- InitialAccess
requiredDataConnectors:
- connectorId: CefAma
dataTypes:
- CommonSecurityLog
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/PingFederate/Analytic Rules/PingFederateUnusualMailDomain.yaml
severity: Medium
name: Ping Federate - Unusual mail domain.
triggerThreshold: 0
queryPeriod: 14d
query: |
let known_domains =
PingFederateEvent
| where TimeGenerated between (ago(14d) .. (1d))
| extend email = extract(@'email=(.*?),.*', 1, AdditionalExtensions)
| extend m_domain = extract(@'@(.*)', 1, email)
| where isnotempty(m_domain)
| summarize makeset(m_domain);
PingFederateEvent
| extend email = extract(@'email=(.*?),.*', 1, AdditionalExtensions)
| extend m_domain = extract(@'@(.*)', 1, email)
| where isnotempty(m_domain)
| where m_domain !in (known_domains)
| extend AccountCustomEntity = DstUserName
| extend IpCustomEntity = SrcIpAddr
relevantTechniques:
- T1078
id: dc79de7d-2590-4852-95fb-f8e02b34f4da
queryFrequency: 1h
status: Available
triggerOperator: gt
version: 1.0.3
entityMappings:
- entityType: Account
fieldMappings:
- columnName: AccountCustomEntity
identifier: Name
- entityType: IP
fieldMappings:
- columnName: IpCustomEntity
identifier: Address
