AWSCloudTrail
| where EventName == "SetDefaultPolicyVersion" and isempty(ErrorCode) and isempty(ErrorMessage)
| extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))
| extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName
requiredDataConnectors:
- connectorId: AWS
dataTypes:
- AWSCloudTrail
triggerOperator: gt
queryFrequency: 1h
name: Policy version set to default
status: Available
queryPeriod: 1h
id: 874a1762-3fd7-4489-b411-6d4a9e9e8a59
description: |
'An attacker with SetDefaultPolicyVersion permissions could escalate privileges through existing policy versions that are not currently in use. More about this API at https://docs.aws.amazon.com/IAM/latest/APIReference/API_SetDefaultPolicyVersion.html '
severity: Medium
query: |
AWSCloudTrail
| where EventName == "SetDefaultPolicyVersion" and isempty(ErrorCode) and isempty(ErrorMessage)
| extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))
| extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName
version: 1.0.0
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_SetDefaulyPolicyVersion.yaml
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
relevantTechniques:
- T1078
tactics:
- InitialAccess
triggerThreshold: 0
{
"$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/874a1762-3fd7-4489-b411-6d4a9e9e8a59')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/874a1762-3fd7-4489-b411-6d4a9e9e8a59')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "Policy version set to default",
"description": "'An attacker with SetDefaultPolicyVersion permissions could escalate privileges through existing policy versions that are not currently in use. More about this API at https://docs.aws.amazon.com/IAM/latest/APIReference/API_SetDefaultPolicyVersion.html '\n",
"severity": "Medium",
"enabled": true,
"query": "AWSCloudTrail\n| where EventName == \"SetDefaultPolicyVersion\" and isempty(ErrorCode) and isempty(ErrorMessage)\n| extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))\n| extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1078"
],
"alertRuleTemplateName": "874a1762-3fd7-4489-b411-6d4a9e9e8a59",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "AccountCustomEntity"
}
],
"entityType": "Account"
},
{
"fieldMappings": [
{
"identifier": "Address",
"columnName": "IPCustomEntity"
}
],
"entityType": "IP"
}
],
"templateVersion": "1.0.0",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_SetDefaulyPolicyVersion.yaml",
"status": "Available"
}
}
]
}