OSSEG Obra Social del Seguro
vicesocietyThis record tracks a ransomware attack claimed by the vicesociety group against OSSEG Obra Social del Seguro. It collects the publicly disclosed attack details — sector, location and timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAPWindow Zero is the time the breach stayed in the open before anyone said so — the gap between when the attack was first discovered on the operator's leak site (t1) and when it was publicly disclosed (t2). The wider this window, the longer victims, staff and customers were exposed with no warning.
Attack Summary
OSSEG, formally Obra Social de la Actividad de Seguros, Reaseguros, Capitalización y Ahorro y Préstamo para la Vivienda, is an Argentine health insurance and social security provider for the insurance sector. It is based in Buenos Aires, Argentina, and serves affiliates nationwide through its website and service offices, offering administrative and healthcare-related member services. The organization is also identified by the acronym OSSEG and is registered with Argentina’s Superintendencia de Servicios de Salud. It was listed as a ransomware victim associated with vicesociety.
Leak Screenshots
SAMPLEProof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.