heywood.org

heywood.org was compromised in a ransomware attack attributed to sinobi in November 2025. The organization, operating in an undisclosed sector in Canada, was added to the group's data leak site as part of an extortion campaign.

sinobi operates as a financially motivated ransomware-as-a-service (RaaS) operation, exfiltrating sensitive data and threatening public disclosure to pressure victims into paying ransom demands.

A member of the Heywood Healthcare system, Heywood Hospital is an acute care hospital in Gardner, MA, providing a broad range of high quality medical, surgical, obstetrical, pediatric and behavioral health services on an inpatient and outpatient basis.