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[ Ransomware claim · medusalocker · 4 Nov 2026 ]

Ulaval

The ransomware group medusalocker named Ulaval (Canada) on its leak site on 4 Nov 2026. This is the group's own claim: it has not been verified by Cyfenced or Ransomware.live, and some claims turn out to be exaggerated, recycled or false.

Not confirmed so farEducation

[ Status ]Has the attack been confirmed?

We have found no statement from Ulaval and no press report of an attack so far. Until the organisation says something, treat the listing as an unproven claim, but stay alert to the phishing such claims are used for.

[ Impact ]Who could be affected

Pupils, students, parents and staff can lose access to lessons, exams and systems, and schools hold personal data about children and families.

[ The attacker ]About medusalocker

medusalocker has claimed 18 organisations in the last 30 days, most in United States, Colombia and India, and mostly in technology, manufacturing and professional services. We wrote about the group in Fifty victims in a day, two hosting breaches and town halls offline.

medusalocker on Ransomware.live

Other organisations medusalocker has named

[ What to do ]If you are a customer, partner or neighbour

  1. Be wary of emails, calls and texts that mention the organisation, especially ones asking you to pay, log in or open an attachment. Criminals use leak-site claims to make phishing believable.
  2. Check announcements on the organisation's own website or official channels, not on social media reposts.
  3. If you share accounts or systems with the organisation, change those passwords and check for unusual logins.
  4. Never visit leak sites or download files claimed to come from the attack: they can contain malware, and handling stolen personal data can be illegal.

[ Similar claims ]Other education organisations in Canada