Canada
CAN
Ontario Medical Supply ransomware disrupts home-care supply coordination
Ontario Medical Supply was infiltrated beginning March 17, 2025, with ransomware activated on April 13 and significant portions of its servers locked. OMS confirmed encryption and data exfiltration; records obtained from Ontario Health atHome show OMS remained disconnected from the agency's systems and could not provide stockout and related supply notifications, with OMS management stating that the inability to integrate was hurting patient care.
77
Estimated severity
77 / 100
92
Source reliability
92 / 100
Approximate Date
17/03/2025
Targeted Company
ONTARIO MEDICAL SUPPLY
Targeted Company Supply Chain Impact
Distribution & Fulfillment
Procurement & Sourcing
Production & Manufacturing
Sales (Retail & Ecommerce)
Warehousing
Service Delivery
Unrecognized Impact
Supply Chain Relations
ONTARIO HEALTH AT HOME (Upstream supplier)
Geographic Impact
Country Targeted Company
Other Affected Countries
No other affected countries reported
Target country
Canada
Affected countries
Canada
Impacted regions
Ontario · Canada
Operational Impact
Duration
No information
Financial impact (USD M)
No information
Impact types
Supplier operation disruptionDownstream customer disruptionSupply chain coordination disruptionOperational disruptionService degradation
Affected sectors
Wholesale & DistributionHealthcare & Public Health
Affected departments
Information TechnologyInventory Management
Attack Profile
Attack types
RansomwareData exfiltration
Attributed threat actors
No information
Sources
Incident Sources
oms.cahttps://oms.ca/notice-of-cybersecurity-incident/globalnews.cahttps://globalnews.ca/news/11724707/ontario-health-athome-ransomware-details/ontariohealthathome.cahttps://www.ontariohealthathome.ca/ontario-medical-supply-data-breach/globalnews.cahttps://globalnews.ca/news/11720041/ontario-health-athome-ransomware/