Disclosure context

About Arcusmedia

Arcusmedia is a relatively new ransomware group that emerged in May 2024, operating with apparent financial motivations based on their targeting patterns across multiple countries and sectors. The group's origin and potential state affiliations remain unclear given limited public documentation from established threat intelligence sources, though their targeting of victims across Brazil, the United States, Spain, UAE, and Mexico suggests either a geographically distributed operation or deliberate international scope. With 98 documented victims in a short operational timeframe, Arcusmedia has demonstrated notable activity levels, primarily focusing on technology, business services, agriculture and food production, and transportation/logistics sectors, though their targeting appears opportunistic rather than strategically focused given the "Not Found" classification as their primary sector target. Limited public reporting from major cybersecurity firms and law enforcement agencies means specific details about their attack methodologies, initial access vectors, encryption techniques, or whether they employ double extortion tactics remain undocumented in authoritative sources. No major campaigns, high-profile victims, or significant law enforcement actions against Arcusmedia have been publicly reported by CISA, FBI, or established threat intelligence organizations. Current operational status appears active based on the recent emergence timeframe, though comprehensive threat intelligence profiles from reputable sources have not yet been published given the group's recent appearance in the threat landscape. The group has been linked to 98 public disclosures across our corpus. First observed on a leak site on May 15, 2024; most recent post September 17, 2025. The operation is currently inactive.

Also tracked as: arcus media.

Timeline of this disclosure

August 12, 2025EB Farmacutica listed by Arcusmediaon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, EB Farmacutica is reported in Brazil, a country with 319 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

← All victims

EB Farmacêutica

listed as EB Farmacutica · Claimed by Arcusmedia · listed 9 months ago

Age

since listed · data leaked

Status timeline

Listed
Aug 12, 2025
Data leaked

At a glance

Group: Arcusmedia
Status: Data leaked
Country: Brazil
Sector: Healthcare
Listed on leak site: Aug 12, 2025

About the victim

AI dossier — public-source company profile

EB Farmacêutica is a Brazilian pharmaceutical company engaged in the distribution of manufactured medicines. Limited public information is available beyond the domain registration.

Industry: Pharmaceutical Distribution

Attack summary

Severity: medium — Data has been published by the threat actor (disclosed_status: data_published), indicating confirmed exfiltration. However, the post excerpt provides no detail on data type, volume, or sensitivity, and no proof files are enumerated. Healthcare sector involvement elevates from low to medium despite lack of specifics.

Arcusmedia claims to have compromised EB Farmacêutica and published data. The specific nature of exfiltrated data and operational impact are not detailed in the available post excerpt.

medium

Data the group says was taken

AI dossier — extracted from the leak post

company data

What the group claims

Days06Hours23Minutes44442222Seconds33331111 ebfarmaceutica.com.br EB Farmacêutica operates in the distribution of manufactured medicine…

Sources

Leak posthttp://arcuufpr5xxbbkin4mlidt7itmr6znlppk63jbtkeguuhszmc5g7qdyd.onion/?p=536

Source

Indexed 9 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.