Privilege escalation via SSM policy
Id | c668c09f-5a49-43f9-b249-6b89a31ec8fb |
Rulename | Privilege escalation via SSM policy |
Description | Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on SSM Policy. Attackers could use these operations for privilege escalation. Verify these actions with the user. |
Severity | Medium |
Tactics | PrivilegeEscalation |
Techniques | T1484 |
Required data connectors | AWS |
Kind | Scheduled |
Query frequency | 1d |
Query period | 1d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Amazon Web Services/Analytic Rules/AWS_PrivilegeEscalationViaSSM.yaml |
Version | 1.0.0 |
Arm template | c668c09f-5a49-43f9-b249-6b89a31ec8fb.json |
AWSCloudTrail
| where EventName in ("PutUserPolicy","PutRolePolicy","PutGroupPolicy") and isempty(ErrorCode) and isempty(ErrorMessage)
| extend PolicyName = tostring(parse_json(RequestParameters).policyName)
| extend Statement = parse_json(tostring((parse_json(RequestParameters).policyDocument))).Statement
| mvexpand Statement
| extend Action = parse_json(Statement).Action , Effect = tostring(parse_json(Statement).Effect), Resource = tostring(parse_json(Statement).Resource), Condition = tostring(parse_json(Statement).Condition)
| extend Action = tostring(Action)
| where Effect =~ "Allow" and (Action contains "ssm:*" or Action contains "ssm:Create*" or Action contains "ssm:CreateAssociation") and Resource == "*" and isempty(Condition)
| distinct TimeGenerated, EventName, PolicyName, SourceIpAddress, UserIdentityArn, UserIdentityUserName
| 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: 1d
name: Privilege escalation via SSM policy
status: Available
queryPeriod: 1d
id: c668c09f-5a49-43f9-b249-6b89a31ec8fb
description: |
'Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on SSM Policy. Attackers could use these operations for privilege escalation. Verify these actions with the user.'
severity: Medium
query: |
AWSCloudTrail
| where EventName in ("PutUserPolicy","PutRolePolicy","PutGroupPolicy") and isempty(ErrorCode) and isempty(ErrorMessage)
| extend PolicyName = tostring(parse_json(RequestParameters).policyName)
| extend Statement = parse_json(tostring((parse_json(RequestParameters).policyDocument))).Statement
| mvexpand Statement
| extend Action = parse_json(Statement).Action , Effect = tostring(parse_json(Statement).Effect), Resource = tostring(parse_json(Statement).Resource), Condition = tostring(parse_json(Statement).Condition)
| extend Action = tostring(Action)
| where Effect =~ "Allow" and (Action contains "ssm:*" or Action contains "ssm:Create*" or Action contains "ssm:CreateAssociation") and Resource == "*" and isempty(Condition)
| distinct TimeGenerated, EventName, PolicyName, SourceIpAddress, UserIdentityArn, UserIdentityUserName
| 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_PrivilegeEscalationViaSSM.yaml
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
relevantTechniques:
- T1484
tactics:
- PrivilegeEscalation
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/c668c09f-5a49-43f9-b249-6b89a31ec8fb')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c668c09f-5a49-43f9-b249-6b89a31ec8fb')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "Privilege escalation via SSM policy",
"description": "'Detected usage of AttachUserPolicy/AttachGroupPolicy/AttachRolePolicy on SSM Policy. Attackers could use these operations for privilege escalation. Verify these actions with the user.'\n",
"severity": "Medium",
"enabled": true,
"query": "AWSCloudTrail\n | where EventName in (\"PutUserPolicy\",\"PutRolePolicy\",\"PutGroupPolicy\") and isempty(ErrorCode) and isempty(ErrorMessage)\n | extend PolicyName = tostring(parse_json(RequestParameters).policyName)\n | extend Statement = parse_json(tostring((parse_json(RequestParameters).policyDocument))).Statement\n | mvexpand Statement\n | extend Action = parse_json(Statement).Action , Effect = tostring(parse_json(Statement).Effect), Resource = tostring(parse_json(Statement).Resource), Condition = tostring(parse_json(Statement).Condition)\n | extend Action = tostring(Action)\n | where Effect =~ \"Allow\" and (Action contains \"ssm:*\" or Action contains \"ssm:Create*\" or Action contains \"ssm:CreateAssociation\") and Resource == \"*\" and isempty(Condition)\n | distinct TimeGenerated, EventName, PolicyName, SourceIpAddress, UserIdentityArn, UserIdentityUserName\n | extend UserIdentityUserName = iff(isnotempty(UserIdentityUserName), UserIdentityUserName, tostring(split(UserIdentityArn,'/')[-1]))\n | extend timestamp = TimeGenerated, IPCustomEntity = SourceIpAddress, AccountCustomEntity = UserIdentityUserName\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"PrivilegeEscalation"
],
"techniques": [
"T1484"
],
"alertRuleTemplateName": "c668c09f-5a49-43f9-b249-6b89a31ec8fb",
"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_PrivilegeEscalationViaSSM.yaml",
"status": "Available"
}
}
]
}