API - Anomaly Detection
Id | 2c59e609-e0a0-4e8e-adc5-ab4224be8a36 |
Rulename | API - Anomaly Detection |
Description | 42Crunch API protection anomaly detection |
Severity | Low |
Tactics | DefenseEvasion |
Required data connectors | 42CrunchAPIProtection |
Kind | Scheduled |
Query frequency | 5m |
Query period | 5m |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIAnomalyDetection.yaml |
Version | 1.0.0 |
Arm template | 2c59e609-e0a0-4e8e-adc5-ab4224be8a36.json |
let infoRec = apifirewall_log_1_CL
| where TimeGenerated >= ago(5m)
| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
| where Instance_Name_s == "Instance_4" and URI_Path_s has "/api/users/info" and Status_d == 200;
let timestamp = toscalar(infoRec | top 1 by Timestamp_t desc | summarize by Timestamp_t);
let activityRec = apifirewall_log_1_CL
| where Timestamp_t < timestamp and TimeGenerated >= ago(5m)
| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
| where Instance_Name_s == "Instance_4" and URI_Path_s has "/api/users/activity" and Status_d == 200;
activityRec
version: 1.0.0
status: Available
queryFrequency: 5m
requiredDataConnectors:
- connectorId: 42CrunchAPIProtection
dataTypes:
- apifirewall_log_1_CL
entityMappings:
- fieldMappings:
- columnName: Source_IP_s
identifier: Address
entityType: IP
- fieldMappings:
- columnName: Hostname_s
identifier: HostName
entityType: Host
- fieldMappings:
- columnName: Instance_Name_s
identifier: FullName
entityType: Account
kind: Scheduled
queryPeriod: 5m
severity: Low
query: |
let infoRec = apifirewall_log_1_CL
| where TimeGenerated >= ago(5m)
| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
| where Instance_Name_s == "Instance_4" and URI_Path_s has "/api/users/info" and Status_d == 200;
let timestamp = toscalar(infoRec | top 1 by Timestamp_t desc | summarize by Timestamp_t);
let activityRec = apifirewall_log_1_CL
| where Timestamp_t < timestamp and TimeGenerated >= ago(5m)
| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g
| where Instance_Name_s == "Instance_4" and URI_Path_s has "/api/users/activity" and Status_d == 200;
activityRec
triggerThreshold: 0
triggerOperator: gt
id: 2c59e609-e0a0-4e8e-adc5-ab4224be8a36
description: |
'42Crunch API protection anomaly detection'
name: API - Anomaly Detection
eventGroupingSettings:
aggregationKind: SingleAlert
relevantTechniques:
tactics:
- DefenseEvasion
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIAnomalyDetection.yaml
customDetails:
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/2c59e609-e0a0-4e8e-adc5-ab4224be8a36')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2c59e609-e0a0-4e8e-adc5-ab4224be8a36')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "API - Anomaly Detection",
"description": "'42Crunch API protection anomaly detection'\n",
"severity": "Low",
"enabled": true,
"query": "let infoRec = apifirewall_log_1_CL\n| where TimeGenerated >= ago(5m) \n| project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g\n| where Instance_Name_s == \"Instance_4\" and URI_Path_s has \"/api/users/info\" and Status_d == 200;\nlet timestamp = toscalar(infoRec | top 1 by Timestamp_t desc | summarize by Timestamp_t);\nlet activityRec = apifirewall_log_1_CL\n | where Timestamp_t < timestamp and TimeGenerated >= ago(5m)\n | project-away Non_blocking_mode_b, Source_Port_d, Destination_Port_d, Query_s, API_ID_g, Request_Header_s, Response_Header_s, Errors_s, Type, UUID_g\n | where Instance_Name_s == \"Instance_4\" and URI_Path_s has \"/api/users/activity\" and Status_d == 200;\nactivityRec\n",
"queryFrequency": "PT5M",
"queryPeriod": "PT5M",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"techniques": null,
"alertRuleTemplateName": "2c59e609-e0a0-4e8e-adc5-ab4224be8a36",
"eventGroupingSettings": {
"aggregationKind": "SingleAlert"
},
"customDetails": null,
"entityMappings": [
{
"entityType": "IP",
"fieldMappings": [
{
"identifier": "Address",
"columnName": "Source_IP_s"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"identifier": "HostName",
"columnName": "Hostname_s"
}
]
},
{
"entityType": "Account",
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "Instance_Name_s"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/42Crunch API Protection/Analytic Rules/APIAnomalyDetection.yaml",
"status": "Available",
"templateVersion": "1.0.0"
}
}
]
}