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Massachusetts Municipal Wholesale Electric

Claimed by Blacksuit · listed 1 year ago

16m
Age
since listed · data leaked

Status timeline

  1. ListedApr 4, 2025
  2. Data leakeddate unknown

At a glance

Group
Blacksuit
Status
Data leaked
Country
United States
Sector
Energy
Listed on leak site
Apr 4, 2025

About the victim

AI dossier — public-source company profile

Massachusetts Municipal Wholesale Electric Company (MMWEC) is a public power joint action agency that provides wholesale electricity services and resource planning to 22 municipal utilities across Massachusetts. Founded in 1973, MMWEC manages power supply, coordinates large regional power plants, and oversees renewable energy projects including solar, wind, hydro, and nuclear assets.

Industry
Electric Utilities & Power Generation
Address
Ludlow, MA
Founded
1973

Attack summary

Severity: high — Critical infrastructure (electric utility cooperative) with confirmed data exfiltration and publication. Access to MMWEC systems could expose operational, financial, and governance data affecting 22 municipal utilities and their customers across Massachusetts.

Blacksuit claims to have compromised MMWEC and published exfiltrated data. No specific operational disruption or ransom demand is stated in the available leak post excerpt.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Financial information
  • Board resolutions and meeting minutes
  • Member utility data
  • Power supply planning documents
  • Corporate governance records
  • Operational data

What the group claims

In the early 1970s, MMWEC worked to gather and focus the collective strength of municipal utilities on issues and developments that were threatening the viability of public power in Massachusetts. Joint action led to the acceptance of municipal utilities into the New England Power Pool in 1973, giving municipals the right to joint ownership in the large, regional power plants under development by private utilities.

Sources

Source

Indexed 1 year 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 Blacksuit

Blacksuit is a financially motivated ransomware group that emerged in June 2023, quickly establishing itself as a significant threat with 184 documented victims across multiple sectors. The group's origin and specific affiliations remain largely undocumented in public threat intelligence reports, though their operational patterns suggest they operate as an independent entity rather than a traditional RaaS model. Blacksuit primarily targets organizations through common initial access vectors and employs standard ransomware deployment techniques, though detailed technical analysis of their specific encryption methods and whether they consistently employ double extortion tactics has not been widely published by major security firms. The group has demonstrated a clear preference for targeting business services, healthcare, government, and manufacturing sectors, with their victims predominantly located in English-speaking countries including the United States, United Kingdom, and Canada, as well as Spain and Germany. As of current reporting, Blacksuit remains an active ransomware operation with no publicly documented law enforcement disruptions or significant rebranding efforts. The group has been linked to 184 public disclosures across our corpus. First observed on a leak site on June 12, 2023; most recent post June 2, 2025. The operation is currently inactive.

Also tracked as: black suit.

Timeline of this disclosure

  • April 4, 2025Massachusetts Municipal Wholesale Electric listed by Blacksuiton the group's public leak site

Other recent disclosures by Blacksuit

Blacksuit has been linked to 184 public victims on Darkfield. A sample of the most recent:

See the full Blacksuit dossier →

Sector and geography

This disclosure adds to ransomware activity in the Energy sector, which has 652 disclosures indexed across all operators we track. Geographically, Massachusetts Municipal Wholesale Electric is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Blacksuit means Massachusetts Municipal Wholesale Electric 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 Blacksuit'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.