mxschmitt

Cursor Cloud Agent — Architecture & Internals

Reverse-engineered from a live Cursor Cloud Agent session running claude-4.6-opus-high-thinking. All findings are based on runtime inspection of /exec-daemon/index.js (15MB webpack bundle, 379K lines), process inspection, network analysis, and system introspection. Date: February 25, 2026.

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Table of Contents

mxschmitt

Odyssey Stealer (ClickFix Campaign) - Malware Investigation

Summary

This repository contains an analysis of a macOS infostealer delivered via a ClickFix social engineering attack hosted on testdino.com. The malware is an instance of Odyssey Stealer (a rebrand of Poseidon Stealer, itself a fork of AMOS/Atomic Stealer) -- a sophisticated macOS credential and cryptocurrency theft tool distributed as Malware-as-a-Service (MaaS) by a Russian-speaking threat actor known as "Rodrigo."

The victim was tricked into pasting a malicious command into their macOS Terminal through a fake CAPTCHA verification page.

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mxschmitt

    - name: Download
      run: Invoke-WebRequest https://bin.equinox.io/c/bNyj1mQVY4c/ngrok-v3-stable-windows-amd64.zip -OutFile ngrok.zip
    - name: Extract
      run: Expand-Archive ngrok.zip
    - name: Auth
      run: .\ngrok\ngrok.exe authtoken $Env:NGROK_AUTH_TOKEN
      env:
        NGROK_AUTH_TOKEN: ...
    - name: Enable TS
      run: Set-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Terminal Server'-name "fDenyTSConnections" -Value 0

mxschmitt

.NET:

• no cache hit (probably because we sign and its then different, or because we do a local install)
• we still have the 600 MB cache folder (which never gets used)

Python:

• no cache hit
• 0MB cache (probably local install does not end up in the cache)

Java:

mxschmitt

Get your list of versions from here: https://nodejs.org/download/nightly/

v20.0.0-nightly20221021eb32a8443a/                 21-Oct-2022 07:30                   - good
v20.0.0-nightly20221031e43ecd5fec/                 31-Oct-2022 07:30                   -
v20.0.0-nightly20221101590cf569fe/                 01-Nov-2022 07:00                   -
v20.0.0-nightly20221111916af4ef2d/                 11-Nov-2022 06:30                   -
v20.0.0-nightly20221121abadaca982/                 22-Nov-2022 19:00                   -
v20.0.0-nightly202212013bed5f11e0/                 01-Dec-2022 07:00                   -
v20.0.0-nightly20221202cc2732d764/                 05-Dec-2022 17:00                   -

mxschmitt

// Writing a polyfill for window.safari.pushNotification.
// Source https://developer.apple.com/library/archive/documentation/NetworkingInternet/Conceptual/NotificationProgrammingGuideForWebsites/PushNotifications/PushNotifications.html

(() => {
  type Permission = 'default' | 'denied' | 'granted';

  class SafariRemoteNotification {
    permission(websitePushID: string) {
      return new SafariRemoteNotificationPermission(null, 'default')
    }

mxschmitt

// @ts-check
import { chromium } from 'playwright';
import assert from 'node:assert';
import path from 'node:path';

process.env.PW_CHROMIUM_ATTACH_TO_OTHER = '1';

(async () => {
  const pathToExtension = path.dirname(new URL(import.meta.url).pathname);
  const context = await chromium.launchPersistentContext('', {

mxschmitt

import { Page } from '@playwright/test';

/**
 * This is a Page Object Model (POM) class for the application's Todo page. It
 * provides locators and common operations that make writing tests easier.
 * @see https://playwright.dev/docs/test-pom
 */
export class TodoPage {
  /**
   * Locators are used to reflect a element on the page with a selector.

mxschmitt

See here: https://github.com/mxschmitt/playwright-test-coverage/

mxschmitt

 Try Playwright (try.playwright.tech) rewrite

+-----------------------------------------------------------------------+   +------------------------------------------------------------------------------------------------------------------------------------+
|                         Before                                        |   |              N times                                            After                                 N times                      |
|        1x time                                    1x time             |   | +------------------------+                                                      +------------------------------------------------+ |
|   +------------------+                +------------------------+      |   | |                        |                                                      |                                                | |
|   |                  |                |                        |      |   | |  Frontend  (LB)        |      +------------------+