Was DMG Contractors hit by ransomware?

DMG Contractors was listed by the Sarcoma ransomware operation (United States), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Sarcoma ransomware group?

Sarcoma is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the DMG Contractors breach?

Sarcoma published data attributed to DMG Contractors (~113 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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DMG Contractors

Claimed by Sarcoma · listed 1 year ago

113 GB

Data size

13m

Age

since listed · data leaked

Status timeline

ListedJun 4, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: United States
Sector: Construction
Listed on leak site: Jun 4, 2025
Data size: 113 GB

About the victim

AI dossier — public-source company profile

DMG Contractors is a U.S.-based construction firm established in 1987 specializing in capital improvements, major renovations, and insurance restoration for multi-family residential properties. The company provides exterior services (siding, painting) and interior renovations (kitchens, bathrooms) across the United States.

Industry: Construction - Multi-Family Residential Renovation & Restoration
Founded: 1987

Attack summary

Severity: medium — Confirmed data exfiltration and publication of 113 GB with no clearnet site to verify operational impact. Data types are not explicitly stated; construction firms typically hold project plans, client/property details, and financial records. Without confirmation of regulated data (PII at scale, financial records, etc.), classified as medium rather than high.

Sarcoma claims to have exfiltrated 113 GB of data from DMG Contractors and published it. The group has disclosed the attack but no specific data types are detailed in the post.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Business records
Project files
Client information

What the group claims

DMG Contractors DMG Contractors, established in 1987, specializes in providing services exclusively for the multi-family industry, including capital improvements, major renovations, and insurance restoration projects across the United States. With over 25 years of experience, the company has developed a skilled workforce and efficient project management strategies to complete projects on time and within budget. Their services range from exterior renovations such as siding replacements and full exterior painting to interior renovations like kitchen and bathroom updates. DMG Contractors aims to meet the needs of apartment communities while minimizing disruption to residents and staff.Geo: USA - Leak size: 113 GB Archive - Contains: Files

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 Sarcoma

Sarcoma is a relatively new ransomware group that emerged in October 2024, operating with apparent financial motivations and demonstrating a broad international targeting approach with at least 140 documented victims across multiple countries and industry sectors. The group's origin and affiliations remain unclear due to its recent emergence, with no publicly documented connections to established ransomware families or confirmation of whether they operate as an independent entity or through a Ransomware-as-a-Service model. Limited public information is available regarding Sarcoma's specific attack methodologies, initial access vectors, or technical capabilities, though their targeting patterns suggest opportunistic rather than highly selective victim selection across diverse industries including manufacturing, business services, agriculture and food production, and technology sectors. The group has shown a particular focus on victims in the United States while also maintaining operations against targets in Italy, Canada, Germany, and Australia, though no specific high-profile attacks or record ransom demands have been publicly documented by major security firms or law enforcement agencies. Given the group's recent emergence in late 2024, Sarcoma appears to remain active with no reported law enforcement disruptions or confirmed rebranding activities at this time. The group has been linked to 150 public disclosures across our corpus. First observed on a leak site on October 9, 2024; most recent post May 12, 2026. The operation is currently active.

Also tracked as: Sarcoma Ransomware Group.

Timeline of this disclosure

June 4, 2025DMG Contractors listed by Sarcomaon the group's public leak site

Data size: 113 GB

Other recent disclosures by Sarcoma

Sarcoma has been linked to 150 public victims on Darkfield. A sample of the most recent:

See the full Sarcoma dossier →

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 988 disclosures indexed across all operators we track. Geographically, DMG Contractors is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means DMG Contractors 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 Sarcoma'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.