TI map Domain entity to Cloud App Events
| Id | a7d2b1e4-dd9c-40fd-9651-1a136eb8f0df |
| Rulename | TI map Domain entity to Cloud App Events |
| Description | Identifies compromises and attacks and detect malicious activities in one’s domain 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/DomainEntity_CloudAppEvents_Updated.yaml |
| Version | 1.0.6 |
| Arm template | a7d2b1e4-dd9c-40fd-9651-1a136eb8f0df.json |
let dt_lookBack = 1h;
let ioc_lookBack = 14d;
let list_tlds =
ThreatIntelIndicators
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
| where IsActive and (ValidUntil > now() or isempty(ValidUntil))
//extract key part of kv pair
| extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
| where IndicatorType == "domain-name"
| extend DomainName = tolower(IndicatorType)
| extend parts = split(DomainName, '.')
| extend tld = parts[(array_length(parts) - 1)]
| extend IndicatorId = tostring(split(Id, "--")[2])
| summarize count() by tostring(tld)
| summarize make_set(tld);
let Domain_Indicators =
ThreatIntelIndicators
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
| where IsActive and (ValidUntil > now() or isempty(ValidUntil))
| extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
| where IndicatorType == "domain-name"
| extend DomainName = tolower(ObservableValue)
| extend IndicatorId = tostring(split(Id, "--")[2])
| project-reorder *, IndicatorType, DomainName, Type;
Domain_Indicators
| join kind=innerunique (
CloudAppEvents
| extend IngestionTime = ingestion_time()
| where IngestionTime > ago(dt_lookBack)
| extend PAUrl = columnifexists("RequestURL", "None")
| extend Domain = tolower(trim('"', tostring(parseurl(PAUrl).Host)))
| extend parts = split(Domain, '.')
| extend tld = parts[(array_length(parts) - 1)]
| extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.DomainName == $right.Domain
| where CloudAppEvents_TimeGenerated < ValidUntil
| summarize CloudAppEvents_TimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId
| extend
Description = tostring(parse_json(max_CloudAppEvents_TimeGenerated_Data).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", ""),
DomainName = column_ifexists("max_CloudAppEvents_TimeGenerated_DomainName", ""),
ProviderName = column_ifexists("max_CloudAppEvents_TimeGenerated_IndicatorProvider", ""),
AlertSeverity = column_ifexists("max_CloudAppEvents_TimeGenerated_ThreatSeverity", ""),
IPAddress = column_ifexists("max_CloudAppEvents_TimeGenerated_IPAddress", "")
| project CloudAppEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DomainName, ProviderName, AlertSeverity, IPAddress
kind: Scheduled
entityMappings:
- entityType: DNS
fieldMappings:
- columnName: DomainName
identifier: DomainName
- entityType: IP
fieldMappings:
- columnName: IPAddress
identifier: Address
description: |
'Identifies compromises and attacks and detect malicious activities in one's domain entity from TI.'
severity: Medium
queryFrequency: 1h
triggerThreshold: 0
relevantTechniques:
- T1071
tactics:
- CommandAndControl
name: TI map Domain entity to Cloud App Events
id: a7d2b1e4-dd9c-40fd-9651-1a136eb8f0df
query: |
let dt_lookBack = 1h;
let ioc_lookBack = 14d;
let list_tlds =
ThreatIntelIndicators
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
| where IsActive and (ValidUntil > now() or isempty(ValidUntil))
//extract key part of kv pair
| extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
| where IndicatorType == "domain-name"
| extend DomainName = tolower(IndicatorType)
| extend parts = split(DomainName, '.')
| extend tld = parts[(array_length(parts) - 1)]
| extend IndicatorId = tostring(split(Id, "--")[2])
| summarize count() by tostring(tld)
| summarize make_set(tld);
let Domain_Indicators =
ThreatIntelIndicators
| where TimeGenerated >= ago(ioc_lookBack)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue
| where IsActive and (ValidUntil > now() or isempty(ValidUntil))
| extend IndicatorType = replace(@"\[|\]|\""", "", tostring(split(ObservableKey, ":", 0)))
| where IndicatorType == "domain-name"
| extend DomainName = tolower(ObservableValue)
| extend IndicatorId = tostring(split(Id, "--")[2])
| project-reorder *, IndicatorType, DomainName, Type;
Domain_Indicators
| join kind=innerunique (
CloudAppEvents
| extend IngestionTime = ingestion_time()
| where IngestionTime > ago(dt_lookBack)
| extend PAUrl = columnifexists("RequestURL", "None")
| extend Domain = tolower(trim('"', tostring(parseurl(PAUrl).Host)))
| extend parts = split(Domain, '.')
| extend tld = parts[(array_length(parts) - 1)]
| extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.DomainName == $right.Domain
| where CloudAppEvents_TimeGenerated < ValidUntil
| summarize CloudAppEvents_TimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId
| extend
Description = tostring(parse_json(max_CloudAppEvents_TimeGenerated_Data).description),
ActivityGroupNames = column_ifexists("max_CloudAppEvents_TimeGenerated_ActivityGroupNames", ""),
ThreatType = column_ifexists("max_CloudAppEvents_TimeGenerated_ThreatType", ""),
ExpirationDateTime = column_ifexists("max_CloudAppEvents_TimeGenerated_ExpirationDateTime", ""),
ConfidenceScore = column_ifexists("max_CloudAppEvents_TimeGenerated_ConfidenceScore", ""),
DomainName = column_ifexists("max_CloudAppEvents_TimeGenerated_DomainName", ""),
ProviderName = column_ifexists("max_CloudAppEvents_TimeGenerated_IndicatorProvider", ""),
AlertSeverity = column_ifexists("max_CloudAppEvents_TimeGenerated_ThreatSeverity", ""),
IPAddress = column_ifexists("max_CloudAppEvents_TimeGenerated_IPAddress", "")
| project CloudAppEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DomainName, ProviderName, AlertSeverity, IPAddress
requiredDataConnectors:
- dataTypes:
- CloudAppEvents
connectorId: MicrosoftThreatProtection
- dataTypes:
- ThreatIntelIndicators
connectorId: MicrosoftDefenderThreatIntelligence
version: 1.0.6
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/DomainEntity_CloudAppEvents_Updated.yaml
queryPeriod: 14d
{
"$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/a7d2b1e4-dd9c-40fd-9651-1a136eb8f0df')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/a7d2b1e4-dd9c-40fd-9651-1a136eb8f0df')]",
"properties": {
"alertRuleTemplateName": "a7d2b1e4-dd9c-40fd-9651-1a136eb8f0df",
"customDetails": null,
"description": "'Identifies compromises and attacks and detect malicious activities in one's domain entity from TI.'\n",
"displayName": "TI map Domain entity to Cloud App Events",
"enabled": true,
"entityMappings": [
{
"entityType": "DNS",
"fieldMappings": [
{
"columnName": "DomainName",
"identifier": "DomainName"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IPAddress",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence (NEW)/Analytic Rules/DomainEntity_CloudAppEvents_Updated.yaml",
"query": "let dt_lookBack = 1h;\nlet ioc_lookBack = 14d; \nlet list_tlds =\n ThreatIntelIndicators\n | where TimeGenerated >= ago(ioc_lookBack)\n | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue\n | where IsActive and (ValidUntil > now() or isempty(ValidUntil))\n //extract key part of kv pair\n | extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n | where IndicatorType == \"domain-name\"\n | extend DomainName = tolower(IndicatorType)\n | extend parts = split(DomainName, '.')\n | extend tld = parts[(array_length(parts) - 1)]\n | extend IndicatorId = tostring(split(Id, \"--\")[2])\n | summarize count() by tostring(tld)\n | summarize make_set(tld);\nlet Domain_Indicators =\n ThreatIntelIndicators\n | where TimeGenerated >= ago(ioc_lookBack)\n | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by Id, ObservableValue\n | where IsActive and (ValidUntil > now() or isempty(ValidUntil))\n | extend IndicatorType = replace(@\"\\[|\\]|\\\"\"\", \"\", tostring(split(ObservableKey, \":\", 0)))\n | where IndicatorType == \"domain-name\"\n | extend DomainName = tolower(ObservableValue)\n | extend IndicatorId = tostring(split(Id, \"--\")[2])\n | project-reorder *, IndicatorType, DomainName, Type;\n Domain_Indicators\n | join kind=innerunique (\n CloudAppEvents\n | extend IngestionTime = ingestion_time()\n | where IngestionTime > ago(dt_lookBack)\n | extend PAUrl = columnifexists(\"RequestURL\", \"None\")\n | extend Domain = tolower(trim('\"', tostring(parseurl(PAUrl).Host)))\n | extend parts = split(Domain, '.')\n | extend tld = parts[(array_length(parts) - 1)]\n | extend CloudAppEvents_TimeGenerated = TimeGenerated) on $left.DomainName == $right.Domain\n | where CloudAppEvents_TimeGenerated < ValidUntil\n | summarize CloudAppEvents_TimeGenerated = argmax(CloudAppEvents_TimeGenerated, *) by IndicatorId\n | extend \n Description = tostring(parse_json(max_CloudAppEvents_TimeGenerated_Data).description),\n ActivityGroupNames = column_ifexists(\"max_CloudAppEvents_TimeGenerated_ActivityGroupNames\", \"\"),\n ThreatType = column_ifexists(\"max_CloudAppEvents_TimeGenerated_ThreatType\", \"\"),\n ExpirationDateTime = column_ifexists(\"max_CloudAppEvents_TimeGenerated_ExpirationDateTime\", \"\"),\n ConfidenceScore = column_ifexists(\"max_CloudAppEvents_TimeGenerated_ConfidenceScore\", \"\"),\n DomainName = column_ifexists(\"max_CloudAppEvents_TimeGenerated_DomainName\", \"\"),\n ProviderName = column_ifexists(\"max_CloudAppEvents_TimeGenerated_IndicatorProvider\", \"\"),\n AlertSeverity = column_ifexists(\"max_CloudAppEvents_TimeGenerated_ThreatSeverity\", \"\"),\n IPAddress = column_ifexists(\"max_CloudAppEvents_TimeGenerated_IPAddress\", \"\")\n | project CloudAppEvents_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, ExpirationDateTime, ConfidenceScore, DomainName, ProviderName, AlertSeverity, IPAddress\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl"
],
"techniques": [
"T1071"
],
"templateVersion": "1.0.6",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}