TI map IP entity to Cloud App Events

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Id	16a45aee-5e39-4d1b-b508-40f847c99353
Rulename	TI map IP entity to Cloud App Events
Description	Identifies compromises and attacks and detect malicious activities in one’s IP entity from TI
Severity	Medium
Tactics	CommandAndControl
Techniques	T1071
Required data connectors	MicrosoftDefenderThreatIntelligence MicrosoftThreatProtection
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/Threat Intelligence (NEW)/Analytic Rules/IPEntity_CloudAppEvents_Updated.yaml
Version	1.0.7
Arm template	16a45aee-5e39-4d1b-b508-40f847c99353.json

KQL

let dt_lookBack = 1d;
let ioc_lookBack = 14d; 
let IP_Indicators = ThreatIntelIndicators
//extract key part of kv pair
     | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
     | where IndicatorType in ("ipv4-addr", "ipv6-addr", "network-traffic")
     | extend NetworkSourceIP = toupper(ObservableValue)
     | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
  | where TimeGenerated >= ago(ioc_lookBack)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
  | where IsActive and (ValidUntil > now() or isempty(ValidUntil))
  | extend TI_ipEntity = iff(isnotempty(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)
  | extend TIipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity);
//  | extend TIipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity);
IP_Indicators
   | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
  | join kind=innerunique (
  CloudAppEvents
    | where TimeGenerated >= ago(dt_lookBack)
    | extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.TI_ipEntity == $right.IPAddress
    | where CloudAppEvents_TimeGenerated < ValidUntil
    | summarize CloudAppEventsTimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by Id, IPAddress
    | extend
      Description = column_ifexists("max_CloudAppEvents_TimeGenerated_Description", ""),
      ActivityGroupNames = column_ifexists("max_CloudAppEvents_TimeGenerated_ActivityGroupNames", ""),
      ThreatType = column_ifexists("max_CloudAppEvents_TimeGenerated_ThreatType", ""),
      ExpirationDateTime = column_ifexists("max_CloudAppEvents_TimeGenerated_ExpirationDateTime", ""),
      ConfidenceScore = column_ifexists("max_CloudAppEvents_TimeGenerated_ConfidenceScore", ""),
      TI_ipEntity = column_ifexists("max_CloudAppEvents_TimeGenerated_TI_ipEntity", ""),
      NetworkDestinationIP = column_ifexists("max_CloudAppEvents_TimeGenerated_NetworkDestinationIP", ""),
      NetworkSourceIP = column_ifexists("max_CloudAppEvents_TimeGenerated_NetworkSourceIP", ""),
      EmailSourceIPAddress = column_ifexists("max_CloudAppEvents_TimeGenerated_EmailSourceIpAddress", "")
    | project CloudAppEventsTimeGenerated, Description, ActivityGroupNames, Id, ThreatType, ExpirationDateTime, ConfidenceScore, TI_ipEntity, NetworkDestinationIP, NetworkSourceIP, EmailSourceIPAddress

YAML

description: |
    'Identifies compromises and attacks and detect malicious activities in one's IP entity from TI'
tactics:
- CommandAndControl
version: 1.0.7
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/IPEntity_CloudAppEvents_Updated.yaml
queryPeriod: 14d
id: 16a45aee-5e39-4d1b-b508-40f847c99353
triggerOperator: gt
requiredDataConnectors:
- dataTypes:
  - CloudAppEvents
  connectorId: MicrosoftThreatProtection
- dataTypes:
  - ThreatIntelIndicators
  connectorId: MicrosoftDefenderThreatIntelligence
triggerThreshold: 0
name: TI map IP entity to Cloud App Events
kind: Scheduled
relevantTechniques:
- T1071
query: |
  let dt_lookBack = 1d;
  let ioc_lookBack = 14d; 
  let IP_Indicators = ThreatIntelIndicators
  //extract key part of kv pair
       | extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
       | where IndicatorType in ("ipv4-addr", "ipv6-addr", "network-traffic")
       | extend NetworkSourceIP = toupper(ObservableValue)
       | extend TrafficLightProtocolLevel = tostring(parse_json(AdditionalFields).TLPLevel)
    | where TimeGenerated >= ago(ioc_lookBack)
    | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
    | where IsActive and (ValidUntil > now() or isempty(ValidUntil))
    | extend TI_ipEntity = iff(isnotempty(NetworkSourceIP), NetworkSourceIP, NetworkSourceIP)
    | extend TIipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity);
  //  | extend TIipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity);
  IP_Indicators
     | project-reorder *, Tags, TrafficLightProtocolLevel, NetworkSourceIP, Type, TI_ipEntity
    | join kind=innerunique (
    CloudAppEvents
      | where TimeGenerated >= ago(dt_lookBack)
      | extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.TI_ipEntity == $right.IPAddress
      | where CloudAppEvents_TimeGenerated < ValidUntil
      | summarize CloudAppEventsTimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by Id, IPAddress
      | extend
        Description = column_ifexists("max_CloudAppEvents_TimeGenerated_Description", ""),
        ActivityGroupNames = column_ifexists("max_CloudAppEvents_TimeGenerated_ActivityGroupNames", ""),
        ThreatType = column_ifexists("max_CloudAppEvents_TimeGenerated_ThreatType", ""),
        ExpirationDateTime = column_ifexists("max_CloudAppEvents_TimeGenerated_ExpirationDateTime", ""),
        ConfidenceScore = column_ifexists("max_CloudAppEvents_TimeGenerated_ConfidenceScore", ""),
        TI_ipEntity = column_ifexists("max_CloudAppEvents_TimeGenerated_TI_ipEntity", ""),
        NetworkDestinationIP = column_ifexists("max_CloudAppEvents_TimeGenerated_NetworkDestinationIP", ""),
        NetworkSourceIP = column_ifexists("max_CloudAppEvents_TimeGenerated_NetworkSourceIP", ""),
        EmailSourceIPAddress = column_ifexists("max_CloudAppEvents_TimeGenerated_EmailSourceIpAddress", "")
      | project CloudAppEventsTimeGenerated, Description, ActivityGroupNames, Id, ThreatType, ExpirationDateTime, ConfidenceScore, TI_ipEntity, NetworkDestinationIP, NetworkSourceIP, EmailSourceIPAddress  
entityMappings:
- fieldMappings:
  - columnName: TI_ipEntity
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: NetworkDestinationIP
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: NetworkSourceIP
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: EmailSourceIPAddress
    identifier: Address
  entityType: IP
queryFrequency: 1h

ARM