Siloah AG

Siloah AG is a healthcare provider headquartered in Switzerland.
The organisation delivers medical services to patients within the Swiss healthcare system.
In May 2023, Siloah AG was identified as one of the clients affected by a ransomware incident that targeted its IT service provider, Unico Data.
The attack was carried out by the Play ransomware gang, which encrypted systems and prompted a full shutdown of Unico Data’s infrastructure.
As a result of the disruption, Siloah AG experienced interruptions to its internal IT operations.
Throughout the incident, the organisation confirmed that patient safety was not compromised.

The ransomware attack on Unico Data caused widespread service interruptions for many of its clients, including a cinema chain, a tool manufacturer, municipal administrations, and healthcare providers such as Siloah AG.
Siloah AG acknowledged that its operations were impacted, though the specific functions affected were not detailed in the public reports.
Restoration work commenced soon after the event, with systems being brought back online gradually over the subsequent days and weeks.
The phased recovery allowed the organisation to resume normal IT functions and continue delivering care.
The episode underscores the exposure of healthcare entities to cyber threats that originate from third‑party service providers.
No additional information regarding Siloah AG’s scale, ownership structure, or subsidiary relationships is available in the supplied sources.