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CARSTAR Business Group

Claimed by Sarcoma · listed 1 year ago

65 GB
Data size
12m
Age
since listed · data leaked

Status timeline

  1. ListedJul 14, 2025
  2. Data leakeddate unknown

At a glance

Group
Sarcoma
Status
Data leaked
Country
United States
Sector
Consumer Services
Listed on leak site
Jul 14, 2025
Data size
65 GB

About the victim

AI dossier — public-source company profile

CARSTAR Business Group is an automotive service and collision repair company headquartered in Ancaster, Ontario, Canada. The company operates with 50–99 employees and generates $5M–10M in annual revenue.

Industry
Automotive Service & Collision Repair
Address
Ancaster, Ontario, Canada
Employees
50-99

Attack summary

Severity: medium — Confirmed exfiltration of 65 GB of business data with published archive; no regulatory/PII-specific claims stated, but scale and automotive service context suggest operational and customer records at risk.

The Sarcoma group claims to have exfiltrated 65 GB of data from CARSTAR Business Group. The group has published the data archive without stating specific operational encryption or ransom demands.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • business files
  • company records

What the group claims

CARSTAR Business Group CARSTAR Business Group is a company that operates in the Automotive Service & Collision Repair industry. It employs 50to99 people and has 5Mto10M of revenue. The company is headquartered in Ancaster, Ontario, Canada.Geo: Canada - Leak size: 65 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

  • July 14, 2025CARSTAR Business Group listed by Sarcomaon the group's public leak site
Data size
65 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 Consumer Services sector, which has 829 disclosures indexed across all operators we track. Geographically, CARSTAR Business Group 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 CARSTAR Business Group 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.