Was The PNST hit by ransomware?

The PNST 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 The PNST breach?

Sarcoma published data attributed to The PNST (~59 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Pacheco Neto Sanden Teisseire Advogados

listed as The PNST · Claimed by Sarcoma · listed 1 year ago

59 GB

Data size

15m

Age

since listed · data leaked

Status timeline

ListedMar 26, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: Brazil
Listed on leak site: Mar 26, 2025
Data size: 59 GB

About the victim

AI dossier — public-source company profile

Pacheco Neto Sanden Teisseire Advogados (PNST) is a Brazilian full-service law firm with national and international reach, specializing in cross-border legal services and serving foreign investors. The firm was formed through a merger of six established legal offices and operates with a multicultural team of professionals with expertise across European markets.

Industry: Legal Services

Attack summary

Severity: high — Confirmed exfiltration of 59 GB of data from a law firm likely contains privileged client communications, financial records, and sensitive business information. Law firms typically hold regulated and highly sensitive data across multiple jurisdictions.

The Sarcoma group claims to have exfiltrated 59 GB of files from PNST. The post indicates data has been published but provides no detail on specific data categories or operational impact.

high

Data the group says was taken

AI dossier — extracted from the leak post

Legal client files
Business records
Correspondence

What the group claims

The PNST Pacheco Neto Sanden Teisseire Advogados (PNST) is a Full Service office with a national and international focus on customer service and foreign investors, through its diverse multicultural team, made up of highly qualified professionals in Cross Border experience and practical experience with the main industries in Europe (Germany, France and Scandinavia). PNST is the result of the merger of six partners and their respective teams of respected offices in the country, who worked for decades sharing the same philosophies of work, life, legal expertise and commercial objectives.Geo: Brazil - Leak size: 59 GB Arcive - 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

March 26, 2025The PNST listed by Sarcomaon the group's public leak site

Data size: 59 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, The PNST is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means The PNST 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.