TI map IP entity to Azure Key Vault logs
Id | 57c7e832-64eb-411f-8928-4133f01f4a25 |
Rulename | TI map IP entity to Azure Key Vault logs |
Description | Identifies a match in Azure Key Vault logs from any IP IOC from TI |
Severity | Medium |
Tactics | CommandAndControl |
Techniques | T1071 |
Required data connectors | AzureKeyVault MicrosoftDefenderThreatIntelligence ThreatIntelligence ThreatIntelligenceTaxii |
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_AzureKeyVault.yaml |
Version | 1.3.4 |
Arm template | 57c7e832-64eb-411f-8928-4133f01f4a25.json |
let dt_lookBack = 1h; // Look back 1 hour for AzureDiagnostics logs
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
// Fetch threat intelligence indicators related to IP addresses
let IP_Indicators = ThreatIntelligenceIndicator
| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
| where TimeGenerated >= ago(ioc_lookBack)
| extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)
| where ipv4_is_private(TI_ipEntity) == false and TI_ipEntity !startswith "fe80" and TI_ipEntity !startswith "::" and TI_ipEntity !startswith "127."
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now();
// Perform a join between IP indicators and AzureDiagnostics logs for Key Vault events
IP_Indicators
// Use innerunique to keep performance fast and result set low, as we only need one match to indicate potential malicious activity that needs investigation
| join kind=innerunique (
AzureDiagnostics
| where ResourceType =~ "VAULTS"
| where TimeGenerated >= ago(dt_lookBack)
| extend KeyVaultEvents_TimeGenerated = TimeGenerated, ClientIP = CallerIPAddress
)
on $left.TI_ipEntity == $right.ClientIP
// Filter out logs that occurred after the expiration of the corresponding indicator
| where KeyVaultEvents_TimeGenerated < ExpirationDateTime
// Group the results by IndicatorId and ClientIP, and keep the log entry with the latest timestamp
| summarize KeyVaultEvents_TimeGenerated = arg_max(KeyVaultEvents_TimeGenerated, *) by IndicatorId, ClientIP
// Select the desired output fields
| project KeyVaultEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore,
TI_ipEntity, ClientIP, ResourceId, SubscriptionId, OperationName, ResultType, CorrelationId, id_s, clientInfo_s, httpStatusCode_d,
identity_claim_appid_g, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g, Type
// Rename the timestamp field
| extend timestamp = KeyVaultEvents_TimeGenerated
name: TI map IP entity to Azure Key Vault logs
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1071
version: 1.3.4
description: |
Identifies a match in Azure Key Vault logs from any IP IOC from TI
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_AzureKeyVault.yaml
requiredDataConnectors:
- connectorId: ThreatIntelligence
dataTypes:
- ThreatIntelligenceIndicator
- connectorId: ThreatIntelligenceTaxii
dataTypes:
- ThreatIntelligenceIndicator
- connectorId: AzureKeyVault
dataTypes:
- KeyVaultData
- connectorId: MicrosoftDefenderThreatIntelligence
dataTypes:
- ThreatIntelligenceIndicator
entityMappings:
- fieldMappings:
- identifier: Address
columnName: ClientIP
entityType: IP
- fieldMappings:
- identifier: ResourceId
columnName: ResourceId
entityType: AzureResource
tactics:
- CommandAndControl
queryPeriod: 14d
query: |
let dt_lookBack = 1h; // Look back 1 hour for AzureDiagnostics logs
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
// Fetch threat intelligence indicators related to IP addresses
let IP_Indicators = ThreatIntelligenceIndicator
| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
| where TimeGenerated >= ago(ioc_lookBack)
| extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)
| extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)
| where ipv4_is_private(TI_ipEntity) == false and TI_ipEntity !startswith "fe80" and TI_ipEntity !startswith "::" and TI_ipEntity !startswith "127."
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now();
// Perform a join between IP indicators and AzureDiagnostics logs for Key Vault events
IP_Indicators
// Use innerunique to keep performance fast and result set low, as we only need one match to indicate potential malicious activity that needs investigation
| join kind=innerunique (
AzureDiagnostics
| where ResourceType =~ "VAULTS"
| where TimeGenerated >= ago(dt_lookBack)
| extend KeyVaultEvents_TimeGenerated = TimeGenerated, ClientIP = CallerIPAddress
)
on $left.TI_ipEntity == $right.ClientIP
// Filter out logs that occurred after the expiration of the corresponding indicator
| where KeyVaultEvents_TimeGenerated < ExpirationDateTime
// Group the results by IndicatorId and ClientIP, and keep the log entry with the latest timestamp
| summarize KeyVaultEvents_TimeGenerated = arg_max(KeyVaultEvents_TimeGenerated, *) by IndicatorId, ClientIP
// Select the desired output fields
| project KeyVaultEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore,
TI_ipEntity, ClientIP, ResourceId, SubscriptionId, OperationName, ResultType, CorrelationId, id_s, clientInfo_s, httpStatusCode_d,
identity_claim_appid_g, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g, Type
// Rename the timestamp field
| extend timestamp = KeyVaultEvents_TimeGenerated
kind: Scheduled
triggerThreshold: 0
id: 57c7e832-64eb-411f-8928-4133f01f4a25
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/57c7e832-64eb-411f-8928-4133f01f4a25')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/57c7e832-64eb-411f-8928-4133f01f4a25')]",
"properties": {
"alertRuleTemplateName": "57c7e832-64eb-411f-8928-4133f01f4a25",
"customDetails": null,
"description": "Identifies a match in Azure Key Vault logs from any IP IOC from TI\n",
"displayName": "TI map IP entity to Azure Key Vault logs",
"enabled": true,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "ClientIP",
"identifier": "Address"
}
]
},
{
"entityType": "AzureResource",
"fieldMappings": [
{
"columnName": "ResourceId",
"identifier": "ResourceId"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_AzureKeyVault.yaml",
"query": "let dt_lookBack = 1h; // Look back 1 hour for AzureDiagnostics logs\nlet ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators\n// Fetch threat intelligence indicators related to IP addresses\nlet IP_Indicators = ThreatIntelligenceIndicator\n | where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)\n | where TimeGenerated >= ago(ioc_lookBack)\n | extend TI_ipEntity = iff(isnotempty(NetworkIP), NetworkIP, NetworkDestinationIP)\n | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(NetworkSourceIP), NetworkSourceIP, TI_ipEntity)\n | extend TI_ipEntity = iff(isempty(TI_ipEntity) and isnotempty(EmailSourceIpAddress), EmailSourceIpAddress, TI_ipEntity)\n | where ipv4_is_private(TI_ipEntity) == false and TI_ipEntity !startswith \"fe80\" and TI_ipEntity !startswith \"::\" and TI_ipEntity !startswith \"127.\"\n | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n | where Active == true and ExpirationDateTime > now();\n// Perform a join between IP indicators and AzureDiagnostics logs for Key Vault events\nIP_Indicators\n // Use innerunique to keep performance fast and result set low, as we only need one match to indicate potential malicious activity that needs investigation\n | join kind=innerunique (\n AzureDiagnostics\n | where ResourceType =~ \"VAULTS\"\n | where TimeGenerated >= ago(dt_lookBack)\n | extend KeyVaultEvents_TimeGenerated = TimeGenerated, ClientIP = CallerIPAddress\n )\n on $left.TI_ipEntity == $right.ClientIP\n // Filter out logs that occurred after the expiration of the corresponding indicator\n | where KeyVaultEvents_TimeGenerated < ExpirationDateTime\n // Group the results by IndicatorId and ClientIP, and keep the log entry with the latest timestamp\n | summarize KeyVaultEvents_TimeGenerated = arg_max(KeyVaultEvents_TimeGenerated, *) by IndicatorId, ClientIP\n // Select the desired output fields\n | project KeyVaultEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore,\n TI_ipEntity, ClientIP, ResourceId, SubscriptionId, OperationName, ResultType, CorrelationId, id_s, clientInfo_s, httpStatusCode_d,\n identity_claim_appid_g, identity_claim_http_schemas_microsoft_com_identity_claims_objectidentifier_g, Type\n // Rename the timestamp field\n | extend timestamp = KeyVaultEvents_TimeGenerated\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl"
],
"techniques": [
"T1071"
],
"templateVersion": "1.3.4",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}