TI map IP entity to OfficeActivity
Id | f15370f4-c6fa-42c5-9be4-1d308f40284e |
Rulename | TI map IP entity to OfficeActivity |
Description | This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in OfficeActivity. |
Severity | Medium |
Tactics | CommandAndControl |
Techniques | T1071 |
Required data connectors | MicrosoftDefenderThreatIntelligence Office365 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_OfficeActivity.yaml |
Version | 1.4.3 |
Arm template | f15370f4-c6fa-42c5-9be4-1d308f40284e.json |
let dt_lookBack = 1h; // Look back 1 hour for OfficeActivity events
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
let OfficeActivity_ = materialize(OfficeActivity
| where isnotempty(ClientIP)
| where TimeGenerated >= ago(dt_lookBack)
| extend ClientIPValues = extract_all(@'\[?(::ffff:)?(?P<IPAddress>(\d+\.\d+\.\d+\.\d+)|[^\]%]+)(%\d+)?\]?([-:](?P<Port>\d+))?', dynamic(["IPAddress", "Port"]), ClientIP)[0]
| extend IPAddress = iff(array_length(ClientIPValues) > 0, tostring(ClientIPValues[0]), '')
| project-rename OfficeActivity_TimeGenerated = TimeGenerated);
let ActivityIPs = OfficeActivity_ | summarize IPs = make_list(IPAddress);
// Fetch threat intelligence indicators related to IP addresses
let IP_Indicators = materialize(ThreatIntelligenceIndicator
| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
| where TimeGenerated >= ago(ioc_lookBack)
| extend TI_ipEntity = coalesce(NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress)
| where TI_ipEntity in (ActivityIPs)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;");
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 (OfficeActivity_)
on $left.TI_ipEntity == $right.IPAddress
// Filter out OfficeActivity events that occurred after the expiration of the corresponding indicator
| where OfficeActivity_TimeGenerated < ExpirationDateTime
// Group the results by IndicatorId and keep the OfficeActivity event with the latest timestamp
| summarize OfficeActivity_TimeGenerated = arg_max(OfficeActivity_TimeGenerated, *) by IndicatorId
// Select the desired output fields
| project OfficeActivity_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, TI_ipEntity, ClientIP, UserId, Operation, ResultStatus, RecordType, OfficeObjectId, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress, Type
| extend timestamp = OfficeActivity_TimeGenerated, Name = tostring(split(UserId, '@', 0)[0]), UPNSuffix = tostring(split(UserId, '@', 1)[0])
query: |
let dt_lookBack = 1h; // Look back 1 hour for OfficeActivity events
let ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators
let OfficeActivity_ = materialize(OfficeActivity
| where isnotempty(ClientIP)
| where TimeGenerated >= ago(dt_lookBack)
| extend ClientIPValues = extract_all(@'\[?(::ffff:)?(?P<IPAddress>(\d+\.\d+\.\d+\.\d+)|[^\]%]+)(%\d+)?\]?([-:](?P<Port>\d+))?', dynamic(["IPAddress", "Port"]), ClientIP)[0]
| extend IPAddress = iff(array_length(ClientIPValues) > 0, tostring(ClientIPValues[0]), '')
| project-rename OfficeActivity_TimeGenerated = TimeGenerated);
let ActivityIPs = OfficeActivity_ | summarize IPs = make_list(IPAddress);
// Fetch threat intelligence indicators related to IP addresses
let IP_Indicators = materialize(ThreatIntelligenceIndicator
| where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)
| where TimeGenerated >= ago(ioc_lookBack)
| extend TI_ipEntity = coalesce(NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress)
| where TI_ipEntity in (ActivityIPs)
| summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId
| where Active == true and ExpirationDateTime > now()
| where Description !contains_cs "State: inactive;" and Description !contains_cs "State: falsepos;");
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 (OfficeActivity_)
on $left.TI_ipEntity == $right.IPAddress
// Filter out OfficeActivity events that occurred after the expiration of the corresponding indicator
| where OfficeActivity_TimeGenerated < ExpirationDateTime
// Group the results by IndicatorId and keep the OfficeActivity event with the latest timestamp
| summarize OfficeActivity_TimeGenerated = arg_max(OfficeActivity_TimeGenerated, *) by IndicatorId
// Select the desired output fields
| project OfficeActivity_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, TI_ipEntity, ClientIP, UserId, Operation, ResultStatus, RecordType, OfficeObjectId, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress, Type
| extend timestamp = OfficeActivity_TimeGenerated, Name = tostring(split(UserId, '@', 0)[0]), UPNSuffix = tostring(split(UserId, '@', 1)[0])
queryFrequency: 1h
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: UserId
- identifier: Name
columnName: Name
- identifier: UPNSuffix
columnName: UPNSuffix
entityType: Account
- fieldMappings:
- identifier: Address
columnName: TI_ipEntity
entityType: IP
- fieldMappings:
- identifier: Url
columnName: Url
entityType: URL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_OfficeActivity.yaml
queryPeriod: 14d
kind: Scheduled
version: 1.4.3
triggerOperator: gt
tactics:
- CommandAndControl
relevantTechniques:
- T1071
name: TI map IP entity to OfficeActivity
triggerThreshold: 0
severity: Medium
description: |
This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in OfficeActivity.
requiredDataConnectors:
- dataTypes:
- ThreatIntelligenceIndicator
connectorId: ThreatIntelligence
- dataTypes:
- ThreatIntelligenceIndicator
connectorId: ThreatIntelligenceTaxii
- dataTypes:
- ThreatIntelligenceIndicator
connectorId: MicrosoftDefenderThreatIntelligence
- dataTypes:
- OfficeActivity
connectorId: Office365
id: f15370f4-c6fa-42c5-9be4-1d308f40284e
{
"$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/f15370f4-c6fa-42c5-9be4-1d308f40284e')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/f15370f4-c6fa-42c5-9be4-1d308f40284e')]",
"properties": {
"alertRuleTemplateName": "f15370f4-c6fa-42c5-9be4-1d308f40284e",
"customDetails": null,
"description": "This query maps any IP indicators of compromise (IOCs) from threat intelligence (TI), by searching for matches in OfficeActivity.\n",
"displayName": "TI map IP entity to OfficeActivity",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "UserId",
"identifier": "FullName"
},
{
"columnName": "Name",
"identifier": "Name"
},
{
"columnName": "UPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "TI_ipEntity",
"identifier": "Address"
}
]
},
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "Url",
"identifier": "Url"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Threat Intelligence/Analytic Rules/IPEntity_OfficeActivity.yaml",
"query": "let dt_lookBack = 1h; // Look back 1 hour for OfficeActivity events\nlet ioc_lookBack = 14d; // Look back 14 days for threat intelligence indicators\nlet OfficeActivity_ = materialize(OfficeActivity\n | where isnotempty(ClientIP)\n | where TimeGenerated >= ago(dt_lookBack)\n | extend ClientIPValues = extract_all(@'\\[?(::ffff:)?(?P<IPAddress>(\\d+\\.\\d+\\.\\d+\\.\\d+)|[^\\]%]+)(%\\d+)?\\]?([-:](?P<Port>\\d+))?', dynamic([\"IPAddress\", \"Port\"]), ClientIP)[0]\n | extend IPAddress = iff(array_length(ClientIPValues) > 0, tostring(ClientIPValues[0]), '')\n | project-rename OfficeActivity_TimeGenerated = TimeGenerated);\nlet ActivityIPs = OfficeActivity_ | summarize IPs = make_list(IPAddress);\n// Fetch threat intelligence indicators related to IP addresses\nlet IP_Indicators = materialize(ThreatIntelligenceIndicator\n | where isnotempty(NetworkIP) or isnotempty(EmailSourceIpAddress) or isnotempty(NetworkDestinationIP) or isnotempty(NetworkSourceIP)\n | where TimeGenerated >= ago(ioc_lookBack)\n | extend TI_ipEntity = coalesce(NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress)\n | where TI_ipEntity in (ActivityIPs)\n | summarize LatestIndicatorTime = arg_max(TimeGenerated, *) by IndicatorId\n | where Active == true and ExpirationDateTime > now()\n | where Description !contains_cs \"State: inactive;\" and Description !contains_cs \"State: falsepos;\");\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 (OfficeActivity_)\n on $left.TI_ipEntity == $right.IPAddress\n// Filter out OfficeActivity events that occurred after the expiration of the corresponding indicator\n| where OfficeActivity_TimeGenerated < ExpirationDateTime\n// Group the results by IndicatorId and keep the OfficeActivity event with the latest timestamp\n| summarize OfficeActivity_TimeGenerated = arg_max(OfficeActivity_TimeGenerated, *) by IndicatorId\n// Select the desired output fields\n| project OfficeActivity_TimeGenerated, Description, ActivityGroupNames, IndicatorId, ThreatType, Url, ExpirationDateTime, ConfidenceScore, TI_ipEntity, ClientIP, UserId, Operation, ResultStatus, RecordType, OfficeObjectId, NetworkIP, NetworkDestinationIP, NetworkSourceIP, EmailSourceIpAddress, Type\n| extend timestamp = OfficeActivity_TimeGenerated, Name = tostring(split(UserId, '@', 0)[0]), UPNSuffix = tostring(split(UserId, '@', 1)[0])\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"severity": "Medium",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CommandAndControl"
],
"techniques": [
"T1071"
],
"templateVersion": "1.4.3",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}