Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
ME
Ransomware Victim Healthcare

MedicSolution+

Ransomware attack by Killsec · Disclosed September 6, 2025 · 🇧🇷 Brazil

medicsolution.app

Date Disclosed
Sep 6, 2025
2025
Threat Group
Killsec
285 total victims
Country
🇧🇷 Brazil
Industry
Healthcare

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Killsec. Figures and technique mappings are quoted from the source data, not inferred.

About the Killsec group

KillSec originated as a hacktivist group aligned with the Anonymous movement before pivoting to ransomware operations in October 2023, officially launching a RaaS platform in June 2024 with an affiliate-friendly 88% revenue split, primarily targeting healthcare, financial services, and government sectors with over 250 documented victims as of late 2025. Killsec has listed 285 victims since February 2024.

Incident Analysis

MedicSolution+ was targeted by Killsec ransomware, one of the most active ransomware groups in our database with 285 confirmed victims globally. The attack was disclosed on September 6, 2025, when MedicSolution+ appeared on the group's dark web leak site.

MedicSolution+ is based in Brazil , operating in the Healthcare sector. Brazil ranks #7 globally for ransomware attacks, with 453 victims in our database.

Sector context: Healthcare organisations are high-value ransomware targets because patient data is extremely sensitive, regulatory penalties for breaches are severe, and operational downtime can threaten patient safety — all factors that increase ransom payment pressure.

Killsec 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 — 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: Sep 11, 2026 14:00 UTC.

Frequently Asked Questions

Was MedicSolution+ attacked by ransomware?

Yes. MedicSolution+ was listed as a victim of the Killsec ransomware group on September 6, 2025. The organisation is based in Brazil and operates in the Healthcare sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked MedicSolution+?

MedicSolution+ was attacked by Killsec ransomware. Killsec is one of the most active ransomware groups, having claimed 285 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the MedicSolution+ ransomware attack occur?

The ransomware attack on MedicSolution+ was disclosed on September 6, 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 MedicSolution+ ransomware attack?

The specific data stolen from MedicSolution+ 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 Healthcare organisation, MedicSolution+ likely held patient records, medical data, and personally identifiable information (PII).

How can organisations protect against Killsec attacks?

To defend against Killsec 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.