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FANASA

Claimed by Stormous · listed 4 months ago

3m
Age
since listed · data leaked

Status timeline

  1. ListedMar 29, 2026
  2. Data leakeddate unknown

At a glance

Group
Stormous
Status
Data leaked
Country
Mexico
Sector
Financial Services
Listed on leak site
Mar 29, 2026

About the victim

AI dossier — public-source company profile

FANASA (fanasa.com) is a Mexican company operating in the financial services sector. Based on the data categories referenced in the leak post — including Electronic Fiscal Documents (CFDI/XML), Taxpayer Identification Numbers (RFC), and financial transaction records — the company appears to provide fiscal, billing, or accounting-related services to corporate clients and vendors in Mexico. No public site content was available to further detail its operations or scale.

Industry
Financial Services & Fiscal Document Processing

Attack summary

Severity: critical — The group claims confirmed exfiltration of regulated financial and fiscal data at scale, including PII (names, emails, phone numbers, dates of birth), government-issued taxpayer IDs (RFC), CFDI/XML fiscal documents, and financial transaction records — all constituting sensitive regulated data under Mexican law (LFPDPPP). Full system access and VPN access are also claimed, indicating deep compromise.

Stormous claims to have exfiltrated approximately half of FANASA's data, including PII, fiscal documents, financial transaction records, commercial invoices, taxpayer IDs, and internal corporate documentation, and states that full system access was obtained; the data is offered for sale.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Personally Identifiable Information (PII)
  • Electronic Fiscal Documents (CFDI/XML)
  • Financial Transaction Records
  • Commercial Invoices & Billing Data
  • Taxpayer Identification Numbers (RFC)
  • Client & Vendor Database
  • Internal Corporate Documentation
  • Administrative/System Files
  • Operational Records
  • Engineering Drawings & Schematics
  • Project Planning & Execution Documents
  • Email & Communication Data
  • Application/Database Data (AYEAPLICACIONES, BDATOSFITCLOD)
  • Software/Program Files (AUTOBOU)
  • Personal/Miscellaneous Files

What the group claims

Personally Identifiable Information (PII), Electronic Fiscal Documents (CFDI/XML), Financial Transaction Records, Commercial Invoices & Billing Data, Taxpayer Identification Numbers (RFC), Client & Vendor Database, Internal Corporate Documentation, Administrative/System Files, operational records, engineering drawings, schematics, Project Planning & Execution Documents, Email/Communication/System/Application Data, user information including email, phone number, full name, date of birth, payment and booking data, ID cards and passports used in booking processes

The leak post

captured from the group's site
Initial Access Brokers - Long-Term Collaboration
We are currently seeking reliable Initial Access Brokers for long-term collaboration.
** Please do not waste time attempting complex exploit development or direct EDR confrontation. We are interested exclusively in stable corporate access.
Local user access is acceptable.
  * Small to mid-sized enterprises: fixed payment starting at 
  * Large enterprises: revenue share from final settlement


FANASA.COM Half the data has been extracted
Personally Identifiable Information (PII), ​Electronic Fiscal Documents (CFDI/XML), ​Financial Transaction Records, ​Commercial Invoices & Billing Data, ​Taxpayer Identification Numbers (RFC), ​Client & Vendor Database/​Internal Corporate Documentation
Administrative/System Files/ADMIN, DOAS, operational records, engineering drawings, schematics...
Project Planning & Execution Documents...
(Folders/Files) Email/Communication/System/Application Data AYEAPLICACIONES database/Log Data BDATOSFITCLOD, Software/Installation/Program Files AUTOBOU, Personal/Miscellaneous Files AvenaCubana
All of this data is offered for sale (user information: email, phone number, full name, date of birth / payment and bookin…

Data the group says was taken

  • PII
  • financial
  • emails
  • passwords
  • contracts

Sources

Source

Indexed 4 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 Stormous

Stormous is a relatively new ransomware group that emerged in March 2022, operating primarily with financial motivations and has claimed responsibility for attacks against at least 165 victims across multiple countries and sectors. The group's country of origin remains unclear from publicly documented sources, though their operational patterns suggest they may operate as an independent entity rather than a established ransomware-as-a-service model. Limited public documentation from major security firms indicates the group employs common ransomware tactics, though specific details about their initial access vectors, encryption methods, and data exfiltration practices have not been extensively detailed in reports from CISA, FBI, or major threat intelligence providers. Their targeting appears geographically diverse with a focus on Spain, the United States, France, UAE, and Brazil, while showing particular interest in technology, hospitality and tourism, government, and business services sectors, though many of their victims span unspecified industries. As of current reporting, Stormous appears to remain an active threat, though the limited public documentation suggests they operate as a lower-tier ransomware group compared to more prominent families that receive extensive coverage from major security research organizations. The group has been linked to 245 public disclosures across our corpus. First observed on a leak site on March 22, 2022; most recent post July 1, 2026. The operation is currently active.

Timeline of this disclosure

  • March 29, 2026FANASA listed by Stormouson the group's public leak site

Other recent disclosures by Stormous

Stormous has been linked to 245 public victims on Darkfield. A sample of the most recent:

See the full Stormous dossier →

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 1,184 disclosures indexed across all operators we track. Geographically, FANASA is reported in Mexico, a country with 196 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Stormous means FANASA 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, CERT-MX (Mexico), as required for your jurisdiction.
  • Monitor for the data appearing on Stormous'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.