Ransomware group profile · #15 by claimed victims

Medusa ransomware

Medusa is a ransomware-as-a-service operation active since June 2021 that has targeted over 300 victims across critical infrastructure sectors including healthcare, education, legal, and manufacturing using double-extortion, with attacks surging 42% between 2023 and 2024 and a formal CISA advisory issued in early 2025.

Active First seen Jan 2023

517Victims claimed on leak sites

0Victims in the last 30 days

0Victims in the last 90 days

50Countries hit

17Leak-site URLs tracked, 1 online

14 Feb 2026Latest claim recorded

Victimology

Who Medusa claims to have breached, from 517 leak-site posts recorded by VULONE.

Claims per month last 12 months

Top sectors

Professional Services98

Manufacturing70

Healthcare63

Technology49

Education45

Government & Defense35

Financial Services32

Retail & E-Commerce32

Top countries

United States262

United Kingdom38

Canada35

Italy14

Australia14

France10

Brazil10

India8

Latest claimed victims 12 most recent

Victim	Sector	Country	Claimed
Balloons Everywhere balloons.com	Retail & E-Commerce	US	14 Feb 2026
South Hays Fire Department southhaysfire.com	Government & Defense	US	14 Feb 2026
Comune di Battipaglia battipaglia.sa.it	Government & Defense	IT	14 Feb 2026
Grandview Family Medicine grandviewfamilymedicine.com	Healthcare	US	14 Feb 2026
MESA Products mesaproducts.com	Manufacturing	US	14 Feb 2026
Resource Corporation of America resourcecorp.com	Healthcare	US	4 Jan 2026
JBS	Healthcare	US	28 Dec 2025
Thunder Bay Counselling thunderbaycounselling.ca	Government & Defense	CA	19 Dec 2025
Sampoerna Agro	Agriculture and Food Production	ID	19 Dec 2025
Shamrock Technologies shamrocktechnologies.com	Technology	US	19 Dec 2025
Callipo Group callipogroup.it	Agriculture and Food Production	IT	19 Dec 2025
Universidade Municipal de São Caetano uscs.edu.br	Education	BR	30 Nov 2025

All 517 Medusa victims, searchable

Full victim list with claim posts, domains, timing and exports, plus the negotiation chats and leak-site screenshots VULONE archives for this crew.

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Tactics, techniques and procedures

ATT&CK technique mapping for Medusa is in progress. Victimology, infrastructure status and leak-site tracking are live above.

Indicators, detections and the full playbook

Hashes, C2 addresses, onion services, Sigma and YARA detections per technique, and the negotiation transcripts are available to signed-in analysts.

See full IOCs

Frequently asked

Is Medusa ransomware still active?

Medusa is tracked as active. The most recent leak-site claim VULONE recorded is dated 14 February 2026.

How many victims has Medusa claimed?

VULONE has recorded 517 leak-site victim claims attributed to Medusa since January 2023, across 50 countries and 14 sectors.

Which industries does Medusa target?

The sectors most often named on the Medusa leak site are Professional Services, Manufacturing, Healthcare.

Which countries are most affected by Medusa?

Most Medusa victims recorded by VULONE are located in United States, United Kingdom, Canada.

Where does VULONE get Medusa victim data?

Claims are collected continuously from the group's own leak sites and cross-checked with ransomware.live and RansomLook. A claim is the group's assertion, not a confirmed breach.

Other ransomware groups

Victim claims are collected from leak sites and enrichment partners (ransomware.live, RansomLook) and represent the group's own assertions, not confirmed breaches. Profile last updated 16 September 2026. Questions or corrections: [email protected].