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Adding entity mapping to the URLEntity_CloudAppEvents.yaml #11119

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Sep 12, 2024
Merged

Adding entity mapping to the URLEntity_CloudAppEvents.yaml #11119

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4 changes: 2 additions & 2 deletions Solutions/Threat Intelligence/Analytic Rules/URLEntity_AuditLogs.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,7 @@ query: |
let AuditEvents = materialize(AuditLogs
| where TimeGenerated >= ago(dt_lookBack)
// Extract the URL that is contained within the JSON data
| extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+);", 1,tostring(TargetResources))
| extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)", 1,tostring(TargetResources))
| where isnotempty(Url)
| extend userPrincipalName = tostring(parse_json(tostring(InitiatedBy.user)).userPrincipalName)
| extend TargetResourceDisplayName = tostring(TargetResources[0].displayName)
Expand Down Expand Up @@ -73,5 +73,5 @@ entityMappings:
fieldMappings:
- identifier: Url
columnName: Url
version: 1.2.7
version: 1.2.8
kind: Scheduled
35 changes: 30 additions & 5 deletions Solutions/Threat Intelligence/Analytic Rules/URLEntity_CloudAppEvents.yaml
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Expand Up @@ -23,16 +23,41 @@ query: |
let ioc_lookBack = 14d;
ThreatIntelligenceIndicator
| where TimeGenerated >= ago(ioc_lookBack)
| where isnotempty(Url)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| join kind=innerunique (CloudAppEvents
| extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+);", 1, tostring(ActivityObjects))
| extend userPrincipalName = tostring(parse_json(tostring(AccountId)).userPrincipalName)
| where TimeGenerated >= ago(dt_lookBack)
| extend Url = extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)", 1, tostring(ActivityObjects))
| extend userPrincipalName = tostring(RawEventData.UserId)
| extend TargetResourceDisplayName = tostring(ActivityObjects[0].displayName)
| extend CloudApps_TimeGenerated = TimeGenerated) on Url
| where CloudApps_TimeGenerated < ExpirationDateTime
| summarize CloudApps_TimeGenerated = argmax(CloudApps_TimeGenerated, *) by IndicatorId, Url
| extend Description = max_CloudApps_TimeGenerated_Description, ActivityGroupNames = max_CloudApps_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudApps_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudApps_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudApps_TimeGenerated_ConfidenceScore
| project CloudApps_TimeGenerated, Description, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore
version: 1.0.2
| extend Description = max_CloudApps_TimeGenerated_Description, ActivityGroupNames = max_CloudApps_TimeGenerated_ActivityGroupNames, ThreatType = max_CloudApps_TimeGenerated_ThreatType, ExpirationDateTime = max_CloudApps_TimeGenerated_ExpirationDateTime, ConfidenceScore = max_CloudApps_TimeGenerated_ConfidenceScore, IPAddress = max_CloudApps_TimeGenerated_IPAddress, AccountObjectId = max_CloudApps_TimeGenerated_AccountObjectId, AccountDisplayName = max_CloudApps_TimeGenerated_AccountDisplayName, ObjectName = max_CloudApps_TimeGenerated_ObjectName, Application= max_CloudApps_TimeGenerated_Application, ApplicationID = max_CloudApps_TimeGenerated_ApplicationId, userPrincipalName = max_CloudApps_TimeGenerated_userPrincipalName
| project CloudApps_TimeGenerated, Description, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, Url, IPAddress, userPrincipalName, AccountObjectId, AccountDisplayName, ObjectName, Application, ApplicationID
entityMappings:
- entityType: Account
fieldMappings:
- identifier: ObjectGuid
columnName: AccountObjectId
- identifier: FullName
columnName: userPrincipalName
- identifier: DisplayName
columnName: AccountDisplayName
- entityType: URL
fieldMappings:
- identifier: Url
columnName: Url
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPAddress
- entityType: CloudApplication
fieldMappings:
- identifier: Name
columnName: Application
- identifier: AppId
columnName: ApplicationID
version: 1.0.3
kind: Scheduled
4 changes: 2 additions & 2 deletions Solutions/Threat Intelligence/Analytic Rules/URLEntity_OfficeActivity.yaml
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Expand Up @@ -38,7 +38,7 @@ query: |
// OfficeActivity
// | where TimeGenerated >= ago(dt_lookBack)
// //Extract the Url from a number of potential fields
// | extend Url = iif(OfficeWorkload == "AzureActiveDirectory",extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+);", 1,ModifiedProperties),tostring(parse_json(ModifiedProperties)[12].NewValue))
// | extend Url = iif(OfficeWorkload == "AzureActiveDirectory",extract("(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\\(\\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)", 1,ModifiedProperties),tostring(parse_json(ModifiedProperties)[12].NewValue))
// | where isnotempty(Url)
// // Ensure we get a clean URL
// | extend Url = tostring(split(Url, ';')[0])
Expand All @@ -65,5 +65,5 @@ entityMappings:
fieldMappings:
- identifier: Url
columnName: Url
version: 1.2.8
version: 1.2.9
kind: Scheduled
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