Disclosure context

About crypto24

Crypto24 is a recently emerged ransomware group first observed in April 2025, with a primary financial motivation evidenced by their targeting of high-value sectors across multiple geographic regions. The group's origin and affiliations remain unclear due to their recent emergence, though their targeting pattern suggests either independent operations or a new ransomware-as-a-service offering given the diverse geographic spread of their 43 documented victims. Their attack methodology and specific technical capabilities have not yet been thoroughly documented by major threat intelligence providers, though their targeting of technology, financial services, healthcare, and business services sectors indicates they likely employ common initial access vectors such as phishing or exploitation of public-facing applications to gain entry into victim networks. The group has demonstrated a preference for targeting organizations primarily in the United States while also conducting operations across Southeast Asia including Malaysia, Singapore, and Indonesia, as well as extending their reach to Egypt, suggesting either a globally distributed affiliate network or opportunistic targeting based on vulnerable infrastructure discovery. Crypto24 remains active as of the latest available intelligence reporting, though given their recent emergence, comprehensive details about their specific tactics, techniques, and procedures await further analysis by established cybersecurity research organizations. The group has been linked to 49 public disclosures across our corpus. First observed on a leak site on April 8, 2025; most recent post May 18, 2026. The operation is currently active.

Timeline of this disclosure

March 24, 2026Estudio O'Farrell listed by crypto24on the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Estudio O'Farrell is reported in AR, a country with 24 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Estudio O'Farrell

Claimed by crypto24 · listed 2 months ago

57d

Age

since listed · data leaked

Status timeline

Listed
Mar 24, 2026
Data leaked

At a glance

Group: crypto24
Status: Data leaked
Country: AR
Sector: Not Found
Listed on leak site: Mar 24, 2026

About the victim

AI dossier — public-source company profile

Estudio O'Farrell is a prestigious Argentine law firm founded in 1883 and headquartered in Buenos Aires, Argentina, making it one of the oldest law firms in the country with 140+ years of operation. The firm provides comprehensive legal advisory services to corporations across areas including corporate law, tax, banking and finance, energy, public law, and infrastructure. It is internationally recognised by Chambers & Partners, Legal 500, and Latin Lawyer 250.

Industry: Legal Services (Corporate, Tax, Banking & Finance, Public Law)
Address: French 3155, CP 1425AWM, CABA, Buenos Aires, Argentina
Founded: 1883

Attack summary

Severity: high — Estudio O'Farrell is a long-established law firm with high-profile corporate clients; exfiltrated data likely includes privileged legal communications, confidential client business information, and potentially regulated personal/financial data. The 'data_published' status confirms active data disclosure, elevating severity despite no stated file count.

The ransomware group crypto24 claims to have compromised Estudio O'Farrell and has published data ('data_published' status), though the leak post provides no specific details on encryption, exfiltration volume, or the precise nature of the data disclosed.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client legal files
Corporate legal documents
Internal communications
Employee records
Financial records

Original description

AI-summarised, not from the leak post

Estudio O'Farrell is a prestigious law firm based in Buenos Aires, Argentina. Known for its comprehensive legal services, the firm specializes in areas such as corporate law, tax law, banking and finance, and labor law among others. Having a history of over 130 years, Estudio O'Farrell has represented multiple high-profile clients and is renowned for its professional and innovative legal solutions.

Sources

Victim siteestudio-ofarrell.com

Source

Indexed 2 months 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.