Cyber Threat Intelligence
Today In Cyber Sponsor Today In Cyber
GR
Ransomware Victim Business Services

Grup Gestio

Ransomware attack by Arcusmedia Β· Disclosed September 17, 2025 Β· πŸ‡ͺπŸ‡Έ Spain

grupgestio.net

Date Disclosed
Sep 17, 2025
2025
Threat Group
Arcusmedia
98 total victims
Country
πŸ‡ͺπŸ‡Έ Spain
Industry
Business Services

Incident Analysis

Grup Gestio was targeted by Arcusmedia ransomware, one of the most active ransomware groups in our database with 98 confirmed victims globally. The attack was disclosed on September 17, 2025, when Grup Gestio appeared on the group's dark web leak site.

Grup Gestio is based in Spain , operating in the Business Services sector. Spain ranks #7 globally for ransomware attacks, with 382 victims in our database.

Sector context: Business services firms often have access to multiple client environments, making them high-value pivot points for ransomware operators seeking to maximise impact across multiple victim organisations.

Arcusmedia typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats β€” paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Jun 13, 2026 06:01 UTC.

Frequently Asked Questions

Was Grup Gestio attacked by ransomware?

Yes. Grup Gestio was listed as a victim of the Arcusmedia ransomware group on September 17, 2025. The organisation is based in Spain and operates in the Business Services sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Grup Gestio?

Grup Gestio was attacked by Arcusmedia ransomware. Arcusmedia is one of the most active ransomware groups, having claimed 98 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Grup Gestio ransomware attack occur?

The ransomware attack on Grup Gestio was disclosed on September 17, 2025. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Grup Gestio ransomware attack?

The specific data stolen from Grup Gestio has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Business Services organisation, Grup Gestio likely held sensitive business data, client information, and operational records.

How can organisations protect against Arcusmedia attacks?

To defend against Arcusmedia and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.