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ATT&CK Technique

Cloud Service Discovery

T1526 · discovery

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.

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. 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 or Disable or Modify Cloud Log.

IaaSIdentity ProviderOffice SuiteSaaS
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Actors Using This

3
predominantly_english_speaking_youth_organized_crimeLAPSUS$
chinaSilk Typhoon
chinaStorm-0558
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Likely Attack Path

Techniques the same actors pair with this one distinctively - those showing up among actors who use this technique noticeably more than across all actors (lift > 1.15), grouped by kill-chain phase. The × is that lift multiplier; the shared-actor count is in the tooltip. A near-universal technique pairs with everything at baseline, so its list is short by design.
initial-access earlier
T1199 · Trusted Relationship ×2.74
persistence earlier
T1098.005 · Device Registration ×19.83T1556 · Modify Authentication Process ×15.87T1078.004 · Cloud Accounts ×4.49T1098 · Account Manipulation ×2.77
credential-access earlier
T1606.002 · SAML Tokens ×47.60T1606 · Forge Web Credentials ×29.75
discovery same
T1087.004 · Cloud Account ×47.60
lateral-movement later
T1550.004 · Web Session Cookie ×34.00T1550.001 · Application Access Token ×23.80T1550 · Use Alternate Authentication Material ×4.58
collection later
T1114.003 · Email Forwarding Rule ×21.64T1530 · Data from Cloud Storage ×8.81T1114.002 · Remote Email Collection ×7.21T1114 · Email Collection ×2.56
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Atomic Tests

3
Executable Atomic Red Team test cases for exercising this technique in a lab. Copy a command, run it on the listed platform, confirm your detections fire.
powershelliaas:azureAzure - 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 
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
powershelliaas:awsAWS - Enumerate common cloud services
Upon successful execution, this test will enumerate common resources that are contained within a valid AWS account. 
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}"
powershelliaas:azureAzure - Enumerate common cloud services
Upon successful execution, this test will enumerate common resources that are contained within a valid Azure subscription. 
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}"
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Detection Coverage

1/6 layers
Coverage across standard detection surfaces. Rows marked none have no rule of that type mapped. Some are real blind spots worth closing; others are simply not applicable to this technique (e.g. YARA matches malware files, not network behaviour).
Behavioral / log (Sigma) 3
Analytics (MITRE CAR) none
Runtime / container (Falco) none
File / malware (YARA) none
Network (Suricata/Snort) none
Vuln scan (Nuclei) none
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Comply & Defend

D3FEND2 defensive techniques
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
MITRE ATT&CKAtomic Red Teamcar (MITRE)
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