DDoS Attacks Cause Major Threema Outages
Brief
Large DDoS attacks disrupted Threema, causing severe communication outages. Threema On-Prem users were unaffected by the attacks.
Threema suffered multiple large-scale DDoS attacks that disrupted its secure messaging service and caused severe communication issues. Organizations using Threema On-Prem were not affected, as their deployments run on their own infrastructure.
Threema is a Swiss paid secure messaging service, similar to WhatsApp or Signal, focused heavily on privacy and security.
“If the attack originates simultaneously from multiple (and potentially changing) sources, it is referred to as a “Distributed Denial of Service” (DDoS) attack. This makes the attack significantly more difficult to defend against because it is not possible to simply block a single source.” reads the report .