Was Milberg hit by ransomware?

Milberg 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 Milberg breach?

Sarcoma published data attributed to Milberg (~3 TB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Milberg LLP

listed as Milberg · Claimed by Sarcoma · listed 1 year ago

3 TB

Data size

12m

Age

since listed · data leaked

Status timeline

ListedJul 8, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: United States
Listed on leak site: Jul 8, 2025
Data size: 3 TB

About the victim

AI dossier — public-source company profile

Milberg is a law firm operating in the United States that represents clients in litigation matters. The firm operates a website at milberg.com and is among several legal practices targeted in this incident.

Industry: Legal Services

Attack summary

Severity: critical — Law firm breach involving exfiltration of 3 TB of data containing confidential client information, attorney-client privileged communications, and sensitive litigation materials. This affects client PII and regulated data across potentially numerous clients at scale.

The Sarcoma group claims to have exfiltrated data from Milberg and three other law firms as part of a coordinated attack. The group states that 3 TB of sensitive information was stolen and is being published as proof of compromise.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Client case files
Legal correspondence
Financial records
Attorney work product
Confidential client information

What the group claims

Why did the ransomware victims' law firm start offering yoga classes? Because they wanted to teach their clients how to stay flexible when dealing with unexpected "attacks"! A law firm that helps ransomware victims got hit themselves? Looks like they have not just clients in hostage, but their own data too! The archive contains data of the following companies: https://thesandersfirm.com/ https://aronovaassociates.com/ https://sgafirm.com/ https://milberg.com/ P.S. We get it, you’re some top-notch lawyers doing everything you can to dodge the fallout with legal tricks, but you still have a shot at a sweet deal for now.Geo: USA - Leak size: 3 TB - Contains: Sensitive information

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 8, 2025Milberg listed by Sarcomaon the group's public leak site

Data size: 3 TB

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, Milberg 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 Milberg 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.