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Mulholland

listed as mulholland.com · Claimed by BrainCipher · listed 3 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedSep 29, 2026
  2. Data leakeddate unknown

At a glance

Group
BrainCipher
Status
Data leaked
Country
United States
Listed on leak site
Sep 29, 2026

About the victim

AI dossier — public-source company profile

Mulholland is a leading industrial and environmental services company serving energy, construction, industrial, and government customers across North America. They provide hydro excavation, municipal services, industrial cleaning, logistics, and specialized support to the energy sector and critical infrastructure projects.

Industry
Industrial & Environmental Services
Address
10308 W County Rd 72, Midland, TX 79707

Attack summary

Severity: critical — Confirmed exfiltration of regulated sensitive data including PII at scale (employee medical records, drug tests, banking/ACH details), customer financial information, and operational data from energy sector clients. Medical records and banking information are subject to HIPAA and financial regulations respectively.

BrainCipher claims to have exfiltrated over 110,900 files totaling 100+ GB. The group alleges access to employee records including drug test results and FMCSA inspection histories, medical/injury records, customer contracts and banking details, operational data including GPS telemetry and rig information, and regulatory documents.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Employee driver folders with drug test records
  • FMCSA inspection history
  • Medical and injury records
  • Master Service Agreements (MSAs) and NDAs
  • Customer W-9 forms and credit applications
  • ACH forms and banking details
  • Rate and billing information
  • GPS telemetry data
  • Daily rig operational data
  • Permit documents (hazardous waste, DOT, airport)

Original description

AI-summarised, not from the leak post

N/A

The leak post

captured from the group's site
We have 110900 files with a total size of over 100 GB. The data includes: 1)Personal driver folders with confidential drugs test records and FMCSA inspection history; 2)Medical data and injury records; 3)MSAs/NDAs with major customers (E&P: Continental Resources, OXY, Chord, Baytex, etc); 4)Customer W-9, credit applications, and ACH forms — counteragent banking details and account information; 5)Rates/billing (volumes, revenue); 6)GPS telemetry;7)Daily rig data (North American Rig Data); 8)Permit documents (Arkansas Haz Waste Permit, DOT audits, OCC/DFW Airport); If you think you are here by mistake, please contact us at [email protected]
⏳ Deadline: October 7, 2026 at 13:00

Sources

Source

Indexed 3 hours 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 Braincipher

Braincipher is a recently emerged ransomware group that was first observed in July 2024, operating with apparent financial motivations and targeting organizations primarily across North America and Europe. The group's origin and potential affiliations remain largely undocumented by major threat intelligence organizations, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing, likely operating as an independent entity rather than through established ransomware-as-a-service infrastructure. Their attack methodology and specific technical capabilities have not been extensively documented by CISA, FBI, or major security research firms, though their victim distribution across 44 confirmed targets spanning business services, manufacturing, technology, and healthcare sectors indicates a generalist approach to target selection rather than sector-specific expertise. No major high-profile campaigns or significant law enforcement actions have been publicly documented against this group by reputable sources, suggesting either a relatively low-impact operational scale or insufficient intelligence collection on their activities. As of current reporting, the group's operational status remains unclear due to limited public documentation from established threat intelligence sources. The group has been linked to 90 public disclosures across our corpus. First observed on a leak site on July 1, 2024; most recent post September 29, 2026. The operation is currently active.

Also tracked as: brain cipher.

Timeline of this disclosure

  • September 29, 2026mulholland.com listed by Braincipher on the group's public leak site

Other recent disclosures by Braincipher

Braincipher has been linked to 90 public victims on Darkfield. A sample of the most recent:

See the full Braincipher dossier →

Sector and geography

Geographically, mulholland.com is reported in United States, a country with 3,167 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Braincipher means mulholland.com 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 Braincipher'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.