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Stuf Storage

Claimed by Fulcrumsec · listed 2 months ago

2m
Age
since listed · data leaked

Status timeline

  1. ListedMay 8, 2026
  2. Data leakeddate unknown

At a glance

Group
Fulcrumsec
Status
Data leaked
Country
United States
Sector
Consumer Services
Listed on leak site
May 8, 2026

About the victim

AI dossier — public-source company profile

Stuf Storage (legally Stuuf Inc., incorporated May 2020 in New York) operates 39 tech-enabled self-storage facilities across nine US cities by converting underutilised commercial space — basements, garages, and retail dead zones — into modern storage units managed remotely via proprietary IoT software (StufOS). The company is venture-backed (~$12.8M raised) and runs its entire operation with approximately three employees. In 2025 it launched SidneyAI, an ElevenLabs-based AI voice agent that handles inbound sales calls and is now marketed as a standalone SaaS product to other storage operators.

Industry
Tech-Enabled Self-Storage / PropTech
Address
New York, NY, USA (incorporated; facilities in New York, Los Angeles, San Francisco, Glendale, Culver City, Walnut Creek, Washington DC, Seattle, and other cities)
Employees
3
Founded
2020

Attack summary

Severity: critical — Confirmed large-scale exfiltration of regulated PII including names, phone numbers, GPS location history, physical lock codes, and thousands of covertly recorded audio calls capturing sensitive personal disclosures (medical conditions, incarceration history, financial distress, crisis situations) for ~3,800 customers across states with all-party consent recording laws (California, Washington). Additionally, full source code and live API credentials were exfiltrated and the complete archive has b

The group claims to have exfiltrated approximately 287 GB of data across 31 AWS S3 buckets containing 19,553 files, including complete replications of two production PostgreSQL databases, 9,111 customer call recordings, 7,362 AI transcripts, 137,297 GPS access events, 5,118 rental contracts, PII for ~3,800 customers, 2,257 storage unit lock codes, 40 GB of application source code, and six sets of API credentials. A ~221 GB archive has been published via an onion link; lock codes were withheld from the public release.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Customer PII (full names, phone numbers, unit assignments, facility locations, pricing)
  • 5,118 rental contracts with digitally signed PDFs
  • 9,111 call recordings (MP3 audio, 3.8 GB)
  • 7,362 AI-generated call transcripts with sentiment analysis
  • 137,297 GPS physical-access unlock events (latitude/longitude coordinates)
  • 2,257 storage unit lock codes
  • 10,231 follow-up SMS messages with personalised booking links
  • 40 GB application source code (22 CodePipeline repositories)
  • 6 API tenant credential sets (client IDs, secrets, private keys)
  • Two complete production PostgreSQL database replicas (SidneyAI — 14 tables; StufOS — 39 tables)
  • Employee email addresses (8 internal staff)
  • 12 external demo account records from competing storage companies

Original description

AI-summarised, not from the leak post

Stuf Storage is a US-based company operating in the self-storage industry. It offers on-demand, flexible storage solutions primarily in urban markets, allowing customers to rent storage units without long-term commitments. The company focuses on converting underutilized urban spaces such as basements and parking structures into storage facilities. Stuf operates across several major US cities and targets city dwellers seeking convenient, accessible storage options.

The leak post

captured from the group's site
[DOWNLOAD COMPLETE ARCHIVE (~221 GB — onion link)](http://4e3p3in2bl67hxchuwza7qvnpe7pyeloyztr5fnh257fxkovfhappjyd.onion/stuf-data/)
287 GB across 31 S3 buckets • 19,553 files • 9,111 call recordings • 7,362 AI transcripts • 137,297 GPS events • 5,118 rental contracts • 3,798 customers • 40 GB source code • Lock codes redacted
This is what happens when a venture-backed startup automates the management of people’s physical belongings and forgets to protect any of it.
3,800 people who rented storage units in New York, Los Angeles, San Francisco, Washington DC, and Seattle. About 9,111 phone calls that were recorded without their knowledge. About 137,297 GPS coordinates that tracked when and where they accessed their own property. About 2,257 lock codes — the actual combinations to their actual storage units — replicated as CSV exports to S3 buckets alongside their names, phone numbers, and unit locations.
And about an AI named Sidney that listened to all of it.
Stuf Storage — legally Stuuf Inc., incorporated May 2020 in New York — is the kind of company that wins awards. named it one of the Most Innovative Companies in 2022. put founder Katharine Lau on its Female Founders 100 list. …

Sources

Source

Indexed 2 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About fulcrumsec

FulcrumSec is a recently emerged ransomware group that was first observed in May 2026, operating with apparent financial motivations based on their targeting patterns across multiple countries and high-value sectors. Given the recency of their emergence and limited public documentation, the group's specific country of origin and potential affiliations remain unclear, though their targeting of victims across the United States, India, Netherlands, Colombia, and Japan suggests either a geographically distributed operation or deliberate international scope rather than nation-state backing. The group has demonstrated a preference for targeting technology companies, business services firms, and healthcare organizations, with 21 documented victims indicating a selective approach focused on sectors likely to yield significant ransom payments due to operational dependencies and sensitive data holdings. Their attack methodology details remain largely undocumented in public threat intelligence reports from major security firms, though their sector targeting suggests sophisticated initial access capabilities given the typically robust security postures of technology and healthcare organizations. No major high-profile campaigns or significant law enforcement actions against FulcrumSec have been publicly reported by CISA, FBI, or leading cybersecurity researchers as of available intelligence. The group appears to remain active as of the most recent observations, though the limited public intelligence on their operations suggests they may be maintaining a relatively low profile compared to more established ransomware enterprises. The group has been linked to 25 public disclosures across our corpus. First observed on a leak site on May 1, 2026; most recent post June 16, 2026. The operation is currently active.

Timeline of this disclosure

  • May 8, 2026Stuf Storage listed by fulcrumsecon the group's public leak site

Other recent disclosures by fulcrumsec

fulcrumsec has been linked to 25 public victims on Darkfield. A sample of the most recent:

See the full fulcrumsec dossier →

Sector and geography

This disclosure adds to ransomware activity in the Consumer Services sector, which has 829 disclosures indexed across all operators we track. Geographically, Stuf Storage is reported in United States, a country with 3,115 ransomware disclosures in our corpus.

If your organisation is affected

A listing by fulcrumsec means Stuf Storage appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Report the incident to your national CERT, CISA (United States), as required for your jurisdiction.
  • Monitor for the data appearing on fulcrumsec's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.