> ## Content Index > Fetch the complete content index at: https://darkwebinformer.com/llms.txt > Use this file to discover other available public pages before exploring further. # ShadowByt3s Claims Starbucks Breach With 10GB of Proprietary Source Code, Beverage Machine Firmware, and Global Management Tools From Compromised S3 Bucket - URL: https://darkwebinformer.com/shadowbyt3s-claims-starbucks-breach-with-10gb-of-proprietary-source-code-beverage-machine-firmware-and-global-management-tools-from-compromised-s3-bucket/ - Published: 2026-04-01T16:43:21.000Z - Updated: 2026-04-01T16:43:21.000Z - Author: Dark Web Informer - Tags: Data Breaches Dark Web Informer - Cyber Threat Intelligence # ShadowByt3s Claims Starbucks Breach With 10GB of Proprietary Source Code, Beverage Machine Firmware, and Global Management Tools From Compromised S3 Bucket April 1, 2026 - 11:07:09 AM UTC United States Food & Beverage / Retail Standalone API Access Now Available High-volume threat-intelligence data, automated ingestion endpoints, ransomware feeds, IOC data, and more. 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[ Subscribe Now](https://darkwebinformer.com/pricing) ## Quick Facts Date & Time 2026-04-01 11:07:09 UTC Threat Actor ShadowByt3s (BlackVortex1) Victim Starbucks Industry Food & Beverage / Retail Category Data Breach / Extortion Data Size 10 GB Source sbux-assets S3 Bucket Data Type Source Code / Firmware / IP Ransom Deadline April 5, 2026 at 5:00 PM Severity Critical Insider Recruitment Active (30/70 Split) Country United States ## Incident Overview A threat group calling themselves ShadowByt3s, posted by the actor BlackVortex1, claims to have breached Starbucks by compromising the sbux-assets S3 bucket and exfiltrating 10GB of proprietary intellectual property including source code, firmware, and global management tools. The group describes this as part of a new campaign targeting misconfigured cloud assets and has set a ransom deadline of April 5, 2026 at 5:00 PM, after which they state all data will be publicly leaked. The stolen data is organized into four categories, all originating from the sbux-assets S3 bucket: - **Proprietary Hardware and Operational Technology**: Beverage dispenser firmware in hex file format for core hardware controllers, including Siren System components and Blue Sparq motor boards. Mastrena II espresso machine control logic including touch-screen interface code and stepper motor configurations (Stepper\_050\_Board\_X.hex). FreshBlends proprietary code and UI packages for automated smoothie and frozen drink stations, including ingredient ratios and pricing logic. - **Global Management and Internal Software**: Source code for the Global Management UI ("New Web UI") featuring a centralized dashboard for managing machines across international regions with global flag assets. Inventory Management Portal (b4-inv/) for tracking global hardware inventory, supply chain logistics, and vendor orders. Operational monitoring tools for log uploads and data-range downloads used by technicians to monitor machine health and performance. - **Developer Environment and Source Code**: JavaScript bundles containing hardcoded API endpoints, internal service URLs, and authentication logic. SCSS source files for management interface styling. Source maps (.map files) that allow minified production code to be reconstructed into human-readable format. Developer backup and staging folders (v-2a-upload-problem, b4-temp-download) that may contain temporary credentials or internal developer notes. - **Visual and Brand Assets**: Internal staff avatars and profile pictures for system administrators and developers. High-resolution Starbucks corporate branding and partner vendor logos (Blue Sparq) used in internal-only applications. The group provided proof and sample links via Mega.nz, with a Telegram channel for files exceeding 1GB. They are also actively recruiting corporate insiders with a 30/70 revenue split (30% to the insider, 70% to the group) with no upfront cost required. The actor's forum account was created in December 2025 with 29 posts, 7 threads, and a reputation of 1. The firmware and OT exposure is the most critical element of this breach. Hex files for beverage dispensers, espresso machine stepper motor configurations, and automated smoothie station code represent the proprietary control logic for physical machines deployed in tens of thousands of Starbucks locations globally. In the wrong hands, this could enable hardware manipulation, supply chain attacks against Starbucks equipment, or competitive reverse engineering of their beverage automation technology. ## Compromised Data Categories Beverage Dispenser Firmware (Hex) Mastrena II Espresso Machine Logic FreshBlends Smoothie Station Code Siren System / Blue Sparq Controllers Global Management UI Source Code Inventory Management Portal Operational Monitoring Tools JavaScript Bundles (API Endpoints) Source Maps (.map Files) SCSS Source Files Developer Backups & Staging Files Internal Staff Avatars Corporate Branding Assets Ingredient Ratios & Pricing Logic ## Image Preview [![Forum post by BlackVortex1 claiming ShadowByt3s breach of Starbucks with 10GB from sbux-assets S3 bucket including firmware, management tools, and proprietary hardware code](https://storage.ghost.io/c/6b/16/6b16ac9c-cd67-432f-b0f3-bbec941084ff/content/images/2026/04/25915399316711038640.png)](https://storage.ghost.io/c/6b/16/6b16ac9c-cd67-432f-b0f3-bbec941084ff/content/images/2026/04/25915399316711038640.png) [![Developer environment source code details, visual brand assets, proof thumbnails, and insider recruitment offer with 30/70 revenue split](https://storage.ghost.io/c/6b/16/6b16ac9c-cd67-432f-b0f3-bbec941084ff/content/images/2026/04/25915399316711038641.png)](https://storage.ghost.io/c/6b/16/6b16ac9c-cd67-432f-b0f3-bbec941084ff/content/images/2026/04/25915399316711038641.png) ## Claim URL Subscriber Access Required The original listing URL and unredacted claim images are available on the Threat Feed and Ransomware Feed for paid subscribers. [ Subscribe](https://darkwebinformer.com/pricing) Subscriber Access View the original listing URL and unredacted claim images on the feeds below. [ Threat Feed](https://darkwebinformer.com/threat-feed/) [ Ransomware Feed](https://darkwebinformer.com/ransomware-feed) ## MITRE ATT&CK Mapping [ T1530 Data from Cloud Storage Compromised the sbux-assets S3 bucket to exfiltrate 10GB of proprietary source code, firmware, and internal management tools from Starbucks' cloud storage infrastructure. ](https://attack.mitre.org/techniques/T1530/) [ T1213 Data from Information Repositories Extracted structured assets from the S3 bucket spanning firmware binaries, management application source code, inventory portal code, and operational monitoring tools. ](https://attack.mitre.org/techniques/T1213/) [ T1552.001 Credentials In Files JavaScript bundles contain hardcoded API endpoints, internal service URLs, and authentication logic. Developer backup folders may contain temporary credentials and internal notes. ](https://attack.mitre.org/techniques/T1552/001/) [ T1588.004 Obtain Capabilities: Digital Certificates Firmware hex files and machine control logic for Mastrena II espresso machines, Siren System components, and Blue Sparq motor boards could enable hardware-level attacks or competitive reverse engineering. ](https://attack.mitre.org/techniques/T1588/004/) [ T1657 Financial Theft Extortion with an April 5 deadline, active insider recruitment with a 30/70 revenue split, and the threat to leak all proprietary IP if ransom is not paid. ](https://attack.mitre.org/techniques/T1657/) [ T1567 Exfiltration Over Web Service Uses Mega.nz for proof/sample distribution and Telegram channels for files exceeding 1GB, with forum posts for public advertisement of the breach. ](https://attack.mitre.org/techniques/T1567/) Dark Web Informer © 2026 | Cyber Threat Intelligence [DarkWebInformer.com](https://darkwebinformer.com/)