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

September 17, 2025Grup Gestio listed by Arcusmediaon 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, Grup Gestio is reported in Spain, a country with 212 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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Grup Gestio

Claimed by Arcusmedia · listed 8 months ago

Age

since listed · data leaked

Status timeline

Listed
Sep 17, 2025
Data leaked

At a glance

Group: Arcusmedia
Status: Data leaked
Country: Spain
Sector: Not Found
Listed on leak site: Sep 17, 2025

About the victim

AI dossier — public-source company profile

Grup Gestio (grupgestio.net) is a Spanish consultancy firm with more than 25 years of experience. Based in Spain, the company appears to offer management or business consulting services. No further operational details are available from the public site at this time.

Industry: Management Consulting

Attack summary

Severity: high — Data has been published by the threat actor, confirming exfiltration. A consultancy firm likely holds sensitive client business information, contracts, and PII, making publication a significant disclosure even without explicit data inventory details.

Arcusmedia claims to have compromised Grup Gestio and has published data (disclosed_status: data_published), suggesting exfiltration of company data, though specific data categories and volume are not detailed in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Consultancy business data
Potentially client records
Internal company documents

What the group claims

Days: 66 Hours: 22 Minutes: 66 Seconds: 99 grupgestio.net We are a consultancy with more than 25 years of experience with the clear id…

Sources

Leak posthttp://arcuufpr5xxbbkin4mlidt7itmr6znlppk63jbtkeguuhszmc5g7qdyd.onion/?p=558

Source

Indexed 8 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.