TI Map IP Entity to W3CIISLog
Id | 5e45930c-09b1-4430-b2d1-cc75ada0dc0f |
Rulename | TI Map IP Entity to W3CIISLog |
Description | This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in W3CIISLog. |
Severity | Medium |
Tactics | CommandAndControl |
Techniques | T1071 |
Required data connectors | AzureMonitor(IIS) 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_W3CIISLog.yaml |
Version | 1.4.2 |
Arm template | 5e45930c-09b1-4430-b2d1-cc75ada0dc0f.json |
let dt_lookBack = 1h; // Look back 1 hour for W3CIISLog events
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 W3CIISLog 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 (
W3CIISLog
| where TimeGenerated >= ago(dt_lookBack)
| where isnotempty(cIP)
| where ipv4_is_private(cIP) == false and cIP !startswith "fe80" and cIP !startswith "::" and cIP !startswith "127."
| extend W3CIISLog_TimeGenerated = TimeGenerated
)
on $left.TI_ipEntity == $right.cIP
// Filter out W3CIISLog events that occurred after the expiration of the corresponding indicator
| where W3CIISLog_TimeGenerated < ExpirationDateTime
// Group the results by IndicatorId and keep the W3CIISLog event with the latest timestamp
| summarize W3CIISLog_TimeGenerated = arg_max(W3CIISLog_TimeGenerated, *) by IndicatorId, cIP
// Select the desired output fields
| project timestamp = W3CIISLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore,
TI_ipEntity, Computer, sSiteName, cIP, sIP, sPort, csMethod, csUserName, scStatus, scSubStatus, scWin32Status,
NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress, Type
queryFrequency: 1h
description: |
This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in W3CIISLog.
name: TI Map IP Entity to W3CIISLog
relevantTechniques:
- T1071
triggerThreshold: 0
id: 5e45930c-09b1-4430-b2d1-cc75ada0dc0f
requiredDataConnectors:
- dataTypes:
- ThreatIntelligenceIndicator
connectorId: ThreatIntelligence
- dataTypes:
- ThreatIntelligenceIndicator
connectorId: ThreatIntelligenceTaxii
- dataTypes:
- ThreatIntelligenceIndicator
connectorId: MicrosoftDefenderThreatIntelligence
- dataTypes:
- W3CIISLog
connectorId: AzureMonitor(IIS)
entityMappings:
- entityType: Account
fieldMappings:
- identifier: Name
columnName: csUserName
- entityType: Host
fieldMappings:
- identifier: HostName
columnName: Computer
- entityType: IP
fieldMappings:
- identifier: Address
columnName: cIP
- entityType: URL
fieldMappings:
- identifier: Url
columnName: Url
queryPeriod: 14d
query: |
let dt_lookBack = 1h; // Look back 1 hour for W3CIISLog events
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 W3CIISLog 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 (
W3CIISLog
| where TimeGenerated >= ago(dt_lookBack)
| where isnotempty(cIP)
| where ipv4_is_private(cIP) == false and cIP !startswith "fe80" and cIP !startswith "::" and cIP !startswith "127."
| extend W3CIISLog_TimeGenerated = TimeGenerated
)
on $left.TI_ipEntity == $right.cIP
// Filter out W3CIISLog events that occurred after the expiration of the corresponding indicator
| where W3CIISLog_TimeGenerated < ExpirationDateTime
// Group the results by IndicatorId and keep the W3CIISLog event with the latest timestamp
| summarize W3CIISLog_TimeGenerated = arg_max(W3CIISLog_TimeGenerated, *) by IndicatorId, cIP
// Select the desired output fields
| project timestamp = W3CIISLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore,
TI_ipEntity, Computer, sSiteName, cIP, sIP, sPort, csMethod, csUserName, scStatus, scSubStatus, scWin32Status,
NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress, Type
kind: Scheduled
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_W3CIISLog.yaml
version: 1.4.2
triggerOperator: gt
tactics:
- CommandAndControl
{
"$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/5e45930c-09b1-4430-b2d1-cc75ada0dc0f')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/5e45930c-09b1-4430-b2d1-cc75ada0dc0f')]",
"properties": {
"alertRuleTemplateName": "5e45930c-09b1-4430-b2d1-cc75ada0dc0f",
"customDetails": null,
"description": "This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in W3CIISLog.\n",
"displayName": "TI Map IP Entity to W3CIISLog",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "csUserName",
"identifier": "Name"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "Computer",
"identifier": "HostName"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "cIP",
"identifier": "Address"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "Url",
"identifier": "Url"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_W3CIISLog.yaml",
"query": "let dt_lookBack = 1h; // Look back 1 hour for W3CIISLog events\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 W3CIISLog 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 W3CIISLog\n | where TimeGenerated >= ago(dt_lookBack)\n | where isnotempty(cIP)\n | where ipv4_is_private(cIP) == false and cIP !startswith \"fe80\" and cIP !startswith \"::\" and cIP !startswith \"127.\"\n | extend W3CIISLog_TimeGenerated = TimeGenerated\n )\n on $left.TI_ipEntity == $right.cIP\n // Filter out W3CIISLog events that occurred after the expiration of the corresponding indicator\n | where W3CIISLog_TimeGenerated < ExpirationDateTime\n // Group the results by IndicatorId and keep the W3CIISLog event with the latest timestamp\n | summarize W3CIISLog_TimeGenerated = arg_max(W3CIISLog_TimeGenerated, *) by IndicatorId, cIP\n // Select the desired output fields\n | project timestamp = W3CIISLog_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore,\n TI_ipEntity, Computer, sSiteName, cIP, sIP, sPort, csMethod, csUserName, scStatus, scSubStatus, scWin32Status,\n NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress, Type\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl"
],
"techniques": [
"T1071"
],
"templateVersion": "1.4.2",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}