T1526 - Cloud Service Discovery

Description from ATT&CK (opens in a new tab)

An adversary may attempt to enumerate the cloud services running on a system after gaining access. These methods can differ from platform-as-a-service (PaaS), to infrastructure-as-a-service (IaaS), or software-as-a-service (SaaS). Many services exist throughout the various cloud providers and can include Continuous Integration and Continuous Delivery (CI/CD), Lambda Functions, Entra ID, etc. They may also include security services, such as AWS GuardDuty and Microsoft Defender for Cloud, and logging services, such as AWS CloudTrail and Google Cloud Audit Logs.

Adversaries may attempt to discover information about the services enabled throughout the environment. Azure tools and APIs, such as the Microsoft Graph API and Azure Resource Manager API, can enumerate resources and services, including applications, management groups, resources and policy definitions, and their relationships that are accessible by an identity.(Citation: Azure - Resource Manager API)(Citation: Azure AD Graph API)

For example, Stormspotter is an open source tool for enumerating and constructing a graph for Azure resources and services, and Pacu is an open source AWS exploitation framework that supports several methods for discovering cloud services.(Citation: Azure - Stormspotter)(Citation: GitHub Pacu)

Adversaries may use the information gained to shape follow-on behaviors, such as targeting data or credentials from enumerated services or evading identified defenses through Disable or Modify Tools (opens in a new tab) or Disable or Modify Cloud Logs (opens in a new tab).

Atomic Tests

• Atomic Test #1 - Azure - Dump Subscription Data with MicroBurst

• Atomic Test #2 - AWS - Enumerate common cloud services

• Atomic Test #3 - Azure - Enumerate common cloud services

Atomic Test #1 - Azure - Dump Subscription Data with MicroBurst

Upon successful execution, this test will enumerate all resources that are contained within a valid Azure subscription. The resources enumerated will display on screen, as well as several csv files and folders will be output to a specified directory, listing what resources were discovered by the script. See https://dev.to/cheahengsoon/enumerating-subscription-information-with-microburst-35a1 (opens in a new tab)

Supported Platforms: Iaas:azure

auto_generated_guid: 1e40bb1d-195e-401e-a86b-c192f55e005c

Inputs:

Attack Commands: Run with powershell!

import-module "PathToAtomicsFolder\..\ExternalPayloads\Get-AzDomainInfo.ps1"
$Password = ConvertTo-SecureString -String "#{password}" -AsPlainText -Force
$Credential = New-Object -TypeName System.Management.Automation.PSCredential -ArgumentList "#{username}", $Password
Connect-AzAccount -Credential $Credential | out-null
Get-AzDomainInfo -folder #{output_directory} -subscription "#{subscription_name}" -verbose

Cleanup Commands:

remove-item #{output_directory} -recurse -force -erroraction silentlycontinue

Dependencies: Run with powershell!

Description: The Get-AzDomainInfo script must exist in PathToAtomicsFolder..\ExternalPayloads.

Check Prereq Commands:

if (test-path "PathToAtomicsFolder\..\ExternalPayloads\Get-AzDomainInfo.ps1"){exit 0} else {exit 1}

Get Prereq Commands:

New-Item -Type Directory "PathToAtomicsFolder\..\ExternalPayloads\" -ErrorAction Ignore -Force | Out-Null
invoke-webrequest "https://raw.githubusercontent.com/NetSPI/MicroBurst/c771c665a2c71f9c5ba474869cd1c211ebee68fd/Az/Get-AzDomainInfo.ps1" -outfile "PathToAtomicsFolder\..\ExternalPayloads\Get-AzDomainInfo.ps1"

Description: The Az module must be installed.

Check Prereq Commands:

try {if (Get-InstalledModule -Name Az -ErrorAction SilentlyContinue) {exit 0} else {exit 1}} catch {exit 1}

Get Prereq Commands:

Install-Module -Name Az -Force

Atomic Test #2 - AWS - Enumerate common cloud services

Upon successful execution, this test will enumerate common resources that are contained within a valid AWS account.

Supported Platforms: Iaas:aws

auto_generated_guid: aa8b9bcc-46fa-4a59-9237-73c7b93a980c

Inputs:

Attack Commands: Run with powershell!

Import-Module "PathToAtomicsFolder\T1526\src\AWSDiscovery.ps1"
$access_key = "#{access_key}"
$secret_key = "#{secret_key}"
$session_token = "#{session_token}"
$aws_profile = "#{profile}"
$regions = "#{regions}"
Set-AWSAuthentication -AccessKey $access_key -SecretKey $secret_key -SessionToken $session_token -AWSProfile $aws_profile
Get-AWSDiscoveryData -Regions $regions -OutputDirectory "#{output_directory}"
Remove-BlankFiles -OutputDirectory "#{output_directory}"

Dependencies: Run with powershell!

Description: The AWS PowerShell module must be installed.

Check Prereq Commands:

try {if (Get-InstalledModule -Name AWSPowerShell -ErrorAction SilentlyContinue) {exit 0} else {exit 1}} catch {exit 1}

Get Prereq Commands:

Install-Module -Name AWSPowerShell -Force

Atomic Test #3 - Azure - Enumerate common cloud services

Upon successful execution, this test will enumerate common resources that are contained within a valid Azure subscription.

Supported Platforms: Iaas:azure

auto_generated_guid: 58f57c8f-db14-4e62-a4d3-5aaf556755d7

Inputs:

Attack Commands: Run with powershell!

Import-Module "PathToAtomicsFolder\T1526\src\AzureDiscovery.ps1"
$client_id = "#{client_id}"
$client_secret = "#{client_secret}"
$tenant_id = "#{tenant_id}"
$environment = "#{cloud}"
Set-AzureAuthentication -ClientID $client_id -ClientSecret $client_secret -TenantID $tenant_id -Environment $environment
Get-AzureDiscoveryData -OutputDirectory "#{output_directory}" -Environment $environment
Remove-BlankFiles -OutputDirectory "#{output_directory}"

Dependencies: Run with powershell!

Description: The Az module must be installed.

Check Prereq Commands:

try {if (Get-InstalledModule -Name Az -ErrorAction SilentlyContinue) {exit 0} else {exit 1}} catch {exit 1}

Get Prereq Commands:

Install-Module -Name Az -Force