Suspicious Resource deployment
Id | 9fb57e58-3ed8-4b89-afcf-c8e786508b1c |
Rulename | Suspicious Resource deployment |
Description | Identifies when a rare Resource and ResourceGroup deployment occurs by a previously unseen Caller. |
Severity | Low |
Tactics | Impact |
Techniques | T1496 |
Required data connectors | AzureActivity |
Kind | Scheduled |
Query frequency | 1d |
Query period | 14d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/NewResourceGroupsDeployedTo.yaml |
Version | 2.0.0 |
Arm template | 9fb57e58-3ed8-4b89-afcf-c8e786508b1c.json |
let szOperationNames = dynamic(["Microsoft.Compute/virtualMachines/write", "Microsoft.Resources/deployments/write"]);
let starttime = 14d;
let endtime = 1d;
let RareCaller = AzureActivity
| where TimeGenerated between (ago(starttime) .. ago(endtime))
| where OperationNameValue in~ (szOperationNames)
| project ResourceGroup, Caller, OperationNameValue, CallerIpAddress
| join kind=rightantisemi (
AzureActivity
| where TimeGenerated > ago(endtime)
| where OperationNameValue in~ (szOperationNames)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated), ActivityStatusValue = makeset(ActivityStatusValue), OperationIds = makeset(OperationId), CallerIpAddress = makeset(CallerIpAddress)
by ResourceId, Caller, OperationNameValue, Resource, ResourceGroup
) on Caller, ResourceGroup
| mvexpand CallerIpAddress
| where isnotempty(CallerIpAddress);
let Counts = RareCaller | summarize ActivityCountByCaller = count() by Caller;
RareCaller | join kind= inner (Counts) on Caller | project-away Caller1
| extend timestamp = StartTimeUtc, AccountCustomEntity = Caller, IPCustomEntity = tostring(CallerIpAddress)
| sort by ActivityCountByCaller desc nulls last
version: 2.0.0
status: Available
queryFrequency: 1d
requiredDataConnectors:
- connectorId: AzureActivity
dataTypes:
- AzureActivity
entityMappings:
- fieldMappings:
- columnName: AccountCustomEntity
identifier: FullName
entityType: Account
- fieldMappings:
- columnName: IPCustomEntity
identifier: Address
entityType: IP
kind: Scheduled
queryPeriod: 14d
severity: Low
query: |
let szOperationNames = dynamic(["Microsoft.Compute/virtualMachines/write", "Microsoft.Resources/deployments/write"]);
let starttime = 14d;
let endtime = 1d;
let RareCaller = AzureActivity
| where TimeGenerated between (ago(starttime) .. ago(endtime))
| where OperationNameValue in~ (szOperationNames)
| project ResourceGroup, Caller, OperationNameValue, CallerIpAddress
| join kind=rightantisemi (
AzureActivity
| where TimeGenerated > ago(endtime)
| where OperationNameValue in~ (szOperationNames)
| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated), ActivityStatusValue = makeset(ActivityStatusValue), OperationIds = makeset(OperationId), CallerIpAddress = makeset(CallerIpAddress)
by ResourceId, Caller, OperationNameValue, Resource, ResourceGroup
) on Caller, ResourceGroup
| mvexpand CallerIpAddress
| where isnotempty(CallerIpAddress);
let Counts = RareCaller | summarize ActivityCountByCaller = count() by Caller;
RareCaller | join kind= inner (Counts) on Caller | project-away Caller1
| extend timestamp = StartTimeUtc, AccountCustomEntity = Caller, IPCustomEntity = tostring(CallerIpAddress)
| sort by ActivityCountByCaller desc nulls last
triggerOperator: gt
id: 9fb57e58-3ed8-4b89-afcf-c8e786508b1c
description: |
'Identifies when a rare Resource and ResourceGroup deployment occurs by a previously unseen Caller.'
triggerThreshold: 0
name: Suspicious Resource deployment
relevantTechniques:
- T1496
tactics:
- Impact
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/NewResourceGroupsDeployedTo.yaml
{
"$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/9fb57e58-3ed8-4b89-afcf-c8e786508b1c')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9fb57e58-3ed8-4b89-afcf-c8e786508b1c')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Suspicious Resource deployment",
"description": "'Identifies when a rare Resource and ResourceGroup deployment occurs by a previously unseen Caller.'\n",
"severity": "Low",
"enabled": true,
"query": "let szOperationNames = dynamic([\"Microsoft.Compute/virtualMachines/write\", \"Microsoft.Resources/deployments/write\"]);\nlet starttime = 14d;\nlet endtime = 1d;\nlet RareCaller = AzureActivity\n| where TimeGenerated between (ago(starttime) .. ago(endtime))\n| where OperationNameValue in~ (szOperationNames)\n| project ResourceGroup, Caller, OperationNameValue, CallerIpAddress\n| join kind=rightantisemi (\nAzureActivity\n| where TimeGenerated > ago(endtime)\n| where OperationNameValue in~ (szOperationNames)\n| summarize StartTimeUtc = min(TimeGenerated), EndTimeUtc = max(TimeGenerated), ActivityStatusValue = makeset(ActivityStatusValue), OperationIds = makeset(OperationId), CallerIpAddress = makeset(CallerIpAddress) \nby ResourceId, Caller, OperationNameValue, Resource, ResourceGroup\n) on Caller, ResourceGroup \n| mvexpand CallerIpAddress\n| where isnotempty(CallerIpAddress);\nlet Counts = RareCaller | summarize ActivityCountByCaller = count() by Caller;\nRareCaller | join kind= inner (Counts) on Caller | project-away Caller1\n| extend timestamp = StartTimeUtc, AccountCustomEntity = Caller, IPCustomEntity = tostring(CallerIpAddress)\n| sort by ActivityCountByCaller desc nulls last \n",
"queryFrequency": "P1D",
"queryPeriod": "P14D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact"
],
"techniques": [
"T1496"
],
"alertRuleTemplateName": "9fb57e58-3ed8-4b89-afcf-c8e786508b1c",
"customDetails": null,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "AccountCustomEntity"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
]
}
],
"status": "Available",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Azure Activity/Analytic Rules/NewResourceGroupsDeployedTo.yaml",
"templateVersion": "2.0.0"
}
}
]
}