Preview - TI map IP entity to Cloud App Events

Back


Id	4e0a6fc8-697e-4455-be47-831b41ea91ac
Rulename	Preview - 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/Analytic Rules/IPEntity_CloudAppEvents.yaml
Version	1.0.3
Arm template	4e0a6fc8-697e-4455-be47-831b41ea91ac.json

KQL

let dt_lookBack = 1d;
let ioc_lookBack = 14d; 
let IP_Indicators = ThreatIntelligenceIndicator
  | where TimeGenerated >= ago(ioc_lookBack)
  | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
  | where Active == true and ExpirationDateTime > now()
  | where isnotempty(NetworkIP)
or isnotempty(EmailSourceIpAddress)
or isnotempty(NetworkDestinationIP)
or isnotempty(NetworkSourceIP)
  | extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
  | 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
  | join kind=innerunique (
  CloudAppEvents
    | where isnotempty(IPAddress)
    | where TimeGenerated >= ago(dt_lookBack)
    | extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.TI_ipEntity == $right.IPAddress
    | where CloudAppEvents_TimeGenerated < ExpirationDateTime
    | summarize CloudAppEventsTimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId, IPAddress
    | extend
        Description = max_CloudAppEvents_TimeGenerated_Description,
        ActivityGroupNames = max_CloudAppEvents_TimeGenerated_ActivityGroupNames,
        ThreatType = max_CloudAppEvents_TimeGenerated_ThreatType,
        ExpirationDateTime = max_CloudAppEvents_TimeGenerated_ExpirationDateTime,
        ConfidenceScore = max_CloudAppEvents_TimeGenerated_ConfidenceScore,
        TI_ipEntity = max_CloudAppEvents_TimeGenerated_TI_ipEntity,
        NetworkDestinationIP = max_CloudAppEvents_TimeGenerated_NetworkDestinationIP,
        NetworkSourceIP = max_CloudAppEvents_TimeGenerated_NetworkSourceIP,
        EmailSourceIPAddress = max_CloudAppEvents_TimeGenerated_EmailSourceIpAddress
    | project CloudAppEventsTimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, TI_ipEntity, NetworkDestinationIP, NetworkSourceIP, EmailSourceIPAddress

YAML

tactics:
- CommandAndControl
query: |
  let dt_lookBack = 1d;
  let ioc_lookBack = 14d; 
  let IP_Indicators = ThreatIntelligenceIndicator
    | where TimeGenerated >= ago(ioc_lookBack)
    | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
    | where Active == true and ExpirationDateTime > now()
    | where isnotempty(NetworkIP)
  or isnotempty(EmailSourceIpAddress)
  or isnotempty(NetworkDestinationIP)
  or isnotempty(NetworkSourceIP)
    | extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
    | 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
    | join kind=innerunique (
    CloudAppEvents
      | where isnotempty(IPAddress)
      | where TimeGenerated >= ago(dt_lookBack)
      | extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.TI_ipEntity == $right.IPAddress
      | where CloudAppEvents_TimeGenerated < ExpirationDateTime
      | summarize CloudAppEventsTimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId, IPAddress
      | extend
          Description = max_CloudAppEvents_TimeGenerated_Description,
          ActivityGroupNames = max_CloudAppEvents_TimeGenerated_ActivityGroupNames,
          ThreatType = max_CloudAppEvents_TimeGenerated_ThreatType,
          ExpirationDateTime = max_CloudAppEvents_TimeGenerated_ExpirationDateTime,
          ConfidenceScore = max_CloudAppEvents_TimeGenerated_ConfidenceScore,
          TI_ipEntity = max_CloudAppEvents_TimeGenerated_TI_ipEntity,
          NetworkDestinationIP = max_CloudAppEvents_TimeGenerated_NetworkDestinationIP,
          NetworkSourceIP = max_CloudAppEvents_TimeGenerated_NetworkSourceIP,
          EmailSourceIPAddress = max_CloudAppEvents_TimeGenerated_EmailSourceIpAddress
      | project CloudAppEventsTimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, TI_ipEntity, NetworkDestinationIP, NetworkSourceIP, EmailSourceIPAddress  
requiredDataConnectors:
- dataTypes:
  - CloudAppEvents
  connectorId: MicrosoftThreatProtection
- dataTypes:
  - ThreatIntelligenceIndicator
  connectorId: MicrosoftDefenderThreatIntelligence
name: Preview - TI map IP entity to Cloud App Events
queryPeriod: 14d
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_CloudAppEvents.yaml
triggerThreshold: 0
description: |
    'Identifies compromises and attacks and detect malicious activities in one's IP entity from TI'
version: 1.0.3
kind: Scheduled
queryFrequency: 1h
severity: Medium
entityMappings:
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: TI_ipEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: NetworkDestinationIP
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: NetworkSourceIP
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: EmailSourceIPAddress
triggerOperator: gt
id: 4e0a6fc8-697e-4455-be47-831b41ea91ac
relevantTechniques:
- T1071

ARM