Was Sinalisa Segurança Viária Ltda hit by ransomware?

Sinalisa Segurança Viária Ltda was listed by the Sarcoma ransomware operation (Brazil), 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 Sinalisa Segurança Viária Ltda breach?

Sarcoma published data attributed to Sinalisa Segurança Viária Ltda (~43 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Sinalisa Segurança Viária Ltda

Claimed by Sarcoma · listed 1 year ago

43 GB

Data size

15m

Age

since listed · data leaked

Status timeline

ListedApr 21, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: Brazil
Listed on leak site: Apr 21, 2025
Data size: 43 GB

About the victim

AI dossier — public-source company profile

Sinalisa Segurança Viária Ltda is a Brazilian road marking and signage company founded in 1971 and based in São Paulo's Mooca neighborhood. The company specializes in horizontal and vertical road marking services, including thermoplastic and acrylic paint systems, serving highways, urban roads, cycle paths, and airports across Brazil.

Industry: Road Safety & Traffic Control Services
Address: Mooca neighborhood, São Paulo, Brazil
Founded: 1971

Attack summary

Severity: medium — Large data exfiltration (43 GB) with confirmed publication, but no specific sensitive data categories (PII at scale, financial, medical) explicitly identified in the post. Medium-sized company in non-critical sector.

The Sarcoma group claims to have exfiltrated 43 GB of data from Sinalisa. The group states data has been published but does not specify the nature of the data compromised or whether encryption occurred.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Company records
Project documentation
Client information

What the group claims

Sinalisa Segurança Viária Ltda Sinalisa's history began about four decades ago when the company was founded by the Ypiranga S/A group in 1971 in Rio de Janeiro. In 1982, it was acquired by the ERITRAM group and its headquarters were transferred to the capital of São Paulo. In November 2000, it moved to its current address in the Mooca neighborhood. A pioneer in the Brazilian road marking market, Sinalisa is a forerunner in lane marking painting with solvent-based acrylic paints, water-emulsified acrylic paints, high-thickness emulsified acrylic paints, conventional and high-relief thermoplastics, smooth, structured and embossed two-component methyl methacrylates. With outstanding performance throughout the national territory in the implementation of horizontal and vertical signage and Intelligent Transportation Systems (ITS), the company has modern equipment for the application of all painting systems. Its scope of work is to prioritize services that aim to improve the safety of road users, through quality and good production performance. Sinalisa performs painting services on highways, urban roads, cycle paths and airports.Geo: Brazil - Leak size: 43 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

April 21, 2025Sinalisa Segurança Viária Ltda listed by Sarcomaon the group's public leak site

Data size: 43 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

Geographically, Sinalisa Segurança Viária Ltda is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Sinalisa Segurança Viária Ltda 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.br (Brazil), 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.