Grant-CKPermissions

Metadata

platform

Azure

contributors

Roberto Rodriguez @Cyb3rWard0g,MSTIC R&D

creation date

2021-08-05

modification date

2021-08-09

Tactics

TA0003

Techniques

T1098

Description

A threat actor might want to grant permissions (Delegated or Application) to an Azure AD application (Service Principal).

Run Simulation

Get OAuth Access Token

from msal import PublicClientApplication
import requests
import time

public_client_app_id = "KATANA_CLIENT_APP_ID"
tenant_id = "TENANT_ID"
function_app_url = "https://FUNCTION_APP_NAME.azurewebsites.net"
scope = function_app_url + "/user_impersonation"

app = PublicClientApplication(
    public_client_app_id,
    authority="https://login.microsoftonline.com/" + tenant_id
)
result = app.acquire_token_interactive(scopes=[scope])
bearer_token = result['access_token']

Set Azure Function Orchestrator

endpoint = function_app_url + "/api/orchestrators/Orchestrator"

Prepare HTTP Body

data = [{'activityFunction': 'Azure', 'type': 'action', 'action': 'Grant-CKPermissions', 'parameters': {'spObjectId': 'ENTER-VALUE', 'resourceName': 'ENTER-VALUE', 'permissionType': 'ENTER-VALUE', 'permissions': ['ENTER-VALUE']}}]

Send HTTP Request

http_headers = {'Authorization': 'Bearer ' + bearer_token, 'Accept': 'application/json','Content-Type': 'application/json'}
results = requests.get(endpoint, json=data, headers=http_headers, stream=False).json()

time.sleep(5)

Explore Output

query_status = requests.get(results['statusQueryGetUri'], headers=http_headers, stream=False).json()
query_results = query_status['output']
query_results