M2131_EventLogManagementPostureChanged_EL0
Id | 1f8fcca5-47ed-409d-a8fa-d49ef821feaf |
Rulename | M2131_EventLogManagementPostureChanged_EL0 |
Description | This alert is desinged to monitor Azure policies aligned with the Maturity Model for Event Log Management (M-21-31) standard. The alert triggers when EL0 policy compliance falls below 70% within a 1 week timeframe. |
Severity | Medium |
Tactics | Discovery |
Techniques | T1082 |
Kind | Scheduled |
Query frequency | 7d |
Query period | 7d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MaturityModelForEventLogManagementM2131/Analytic Rules/M2131EventLogManagementPostureChangedEL0.yaml |
Version | 1.0.0 |
Arm template | 1f8fcca5-47ed-409d-a8fa-d49ef821feaf.json |
SecurityRecommendation
| where RecommendationDisplayName <> ""
| extend MaturityLevel=iff(RecommendationDisplayName has_any("agent","extension","retention","logs encryption","collect","retained","log profile","CloudTrail","metric","AWS","GCP","DNS","Auditing","Flow","logging","usage"), "Event Logging (EL0)",
iff(RecommendationDisplayName has_any("container registries","logic apps","Enhanced monitoring","IoT Hub","Event Hub","App Service", "Kubernetes","updates","email", "automation", "adaptive"), "Advanced Event Logging (EL3)",
iff(RecommendationDisplayName has_any("signatures","CMK","CMEK","double encryption","managed key","KMS","container","Watcher"), "Intermediate Event Logging (EL2)",
iff(RecommendationDisplayName has_any("Exploit Guard","endpoint protection","Antimalware","health","VPC","Defender","Vulnerabilities","vulnerability","diagnostic","Key","activity log alert",""), "Basic Event Logging (EL1)","Other"))))
| summarize arg_max(TimeGenerated, *) by RecommendationDisplayName, AssessedResourceId, MaturityLevel
| summarize Failed = countif(RecommendationState == "Unhealthy"), Passed = countif(RecommendationState == "Healthy"), Total = countif(RecommendationState == "Healthy" or RecommendationState == "Unhealthy") by MaturityLevel
| extend PassedControls = (Passed/todouble(Total))*100
| extend RemediationLink = strcat('https://portal.azure.com/#blade/Microsoft_Azure_Security/SecurityMenuBlade/22')
| project MaturityLevel, Total, PassedControls, Passed, Failed, RemediationLink, LastObserved=now()
| where MaturityLevel <> ''
| where MaturityLevel == "Event Logging (EL0)"
| where PassedControls < 70
//Adjust Either FailedRatePercentage or PasedRatePercentage Thresholds within Organizational Needs
| sort by PassedControls desc
| extend URLCustomEntity = RemediationLink
id: 1f8fcca5-47ed-409d-a8fa-d49ef821feaf
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MaturityModelForEventLogManagementM2131/Analytic Rules/M2131EventLogManagementPostureChangedEL0.yaml
requiredDataConnectors: []
description: |
'This alert is desinged to monitor Azure policies aligned with the Maturity Model for Event Log Management (M-21-31) standard. The alert triggers when EL0 policy compliance falls below 70% within a 1 week timeframe.'
severity: Medium
queryPeriod: 7d
kind: Scheduled
tactics:
- Discovery
queryFrequency: 7d
query: |
SecurityRecommendation
| where RecommendationDisplayName <> ""
| extend MaturityLevel=iff(RecommendationDisplayName has_any("agent","extension","retention","logs encryption","collect","retained","log profile","CloudTrail","metric","AWS","GCP","DNS","Auditing","Flow","logging","usage"), "Event Logging (EL0)",
iff(RecommendationDisplayName has_any("container registries","logic apps","Enhanced monitoring","IoT Hub","Event Hub","App Service", "Kubernetes","updates","email", "automation", "adaptive"), "Advanced Event Logging (EL3)",
iff(RecommendationDisplayName has_any("signatures","CMK","CMEK","double encryption","managed key","KMS","container","Watcher"), "Intermediate Event Logging (EL2)",
iff(RecommendationDisplayName has_any("Exploit Guard","endpoint protection","Antimalware","health","VPC","Defender","Vulnerabilities","vulnerability","diagnostic","Key","activity log alert",""), "Basic Event Logging (EL1)","Other"))))
| summarize arg_max(TimeGenerated, *) by RecommendationDisplayName, AssessedResourceId, MaturityLevel
| summarize Failed = countif(RecommendationState == "Unhealthy"), Passed = countif(RecommendationState == "Healthy"), Total = countif(RecommendationState == "Healthy" or RecommendationState == "Unhealthy") by MaturityLevel
| extend PassedControls = (Passed/todouble(Total))*100
| extend RemediationLink = strcat('https://portal.azure.com/#blade/Microsoft_Azure_Security/SecurityMenuBlade/22')
| project MaturityLevel, Total, PassedControls, Passed, Failed, RemediationLink, LastObserved=now()
| where MaturityLevel <> ''
| where MaturityLevel == "Event Logging (EL0)"
| where PassedControls < 70
//Adjust Either FailedRatePercentage or PasedRatePercentage Thresholds within Organizational Needs
| sort by PassedControls desc
| extend URLCustomEntity = RemediationLink
version: 1.0.0
triggerThreshold: 0
name: M2131_EventLogManagementPostureChanged_EL0
entityMappings:
- entityType: URL
fieldMappings:
- columnName: URLCustomEntity
identifier: Url
status: Available
relevantTechniques:
- T1082
{
"$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/1f8fcca5-47ed-409d-a8fa-d49ef821feaf')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/1f8fcca5-47ed-409d-a8fa-d49ef821feaf')]",
"properties": {
"alertRuleTemplateName": "1f8fcca5-47ed-409d-a8fa-d49ef821feaf",
"customDetails": null,
"description": "'This alert is desinged to monitor Azure policies aligned with the Maturity Model for Event Log Management (M-21-31) standard. The alert triggers when EL0 policy compliance falls below 70% within a 1 week timeframe.'\n",
"displayName": "M2131_EventLogManagementPostureChanged_EL0",
"enabled": true,
"entityMappings": [
{
"entityType": "URL",
"fieldMappings": [
{
"columnName": "URLCustomEntity",
"identifier": "Url"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/MaturityModelForEventLogManagementM2131/Analytic Rules/M2131EventLogManagementPostureChangedEL0.yaml",
"query": "SecurityRecommendation\n| where RecommendationDisplayName <> \"\"\n| extend MaturityLevel=iff(RecommendationDisplayName has_any(\"agent\",\"extension\",\"retention\",\"logs encryption\",\"collect\",\"retained\",\"log profile\",\"CloudTrail\",\"metric\",\"AWS\",\"GCP\",\"DNS\",\"Auditing\",\"Flow\",\"logging\",\"usage\"), \"Event Logging (EL0)\",\niff(RecommendationDisplayName has_any(\"container registries\",\"logic apps\",\"Enhanced monitoring\",\"IoT Hub\",\"Event Hub\",\"App Service\", \"Kubernetes\",\"updates\",\"email\", \"automation\", \"adaptive\"), \"Advanced Event Logging (EL3)\",\niff(RecommendationDisplayName has_any(\"signatures\",\"CMK\",\"CMEK\",\"double encryption\",\"managed key\",\"KMS\",\"container\",\"Watcher\"), \"Intermediate Event Logging (EL2)\",\niff(RecommendationDisplayName has_any(\"Exploit Guard\",\"endpoint protection\",\"Antimalware\",\"health\",\"VPC\",\"Defender\",\"Vulnerabilities\",\"vulnerability\",\"diagnostic\",\"Key\",\"activity log alert\",\"\"), \"Basic Event Logging (EL1)\",\"Other\"))))\n| summarize arg_max(TimeGenerated, *) by RecommendationDisplayName, AssessedResourceId, MaturityLevel\n| summarize Failed = countif(RecommendationState == \"Unhealthy\"), Passed = countif(RecommendationState == \"Healthy\"), Total = countif(RecommendationState == \"Healthy\" or RecommendationState == \"Unhealthy\") by MaturityLevel\n| extend PassedControls = (Passed/todouble(Total))*100\n| extend RemediationLink = strcat('https://portal.azure.com/#blade/Microsoft_Azure_Security/SecurityMenuBlade/22')\n| project MaturityLevel, Total, PassedControls, Passed, Failed, RemediationLink, LastObserved=now()\n| where MaturityLevel <> ''\n| where MaturityLevel == \"Event Logging (EL0)\"\n| where PassedControls < 70 \n//Adjust Either FailedRatePercentage or PasedRatePercentage Thresholds within Organizational Needs\n| sort by PassedControls desc\n| extend URLCustomEntity = RemediationLink\n",
"queryFrequency": "P7D",
"queryPeriod": "P7D",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Discovery"
],
"techniques": [
"T1082"
],
"templateVersion": "1.0.0",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}