Cyber Incident Victim: Frankfurter University of Applied Sciences
Date:
Oct 2023
Location:
Germany
Summary
A DDoS attack targeted Frankfurt's city website, causing several hours of downtime by overwhelming servers with coordinated requests; similar attacks simultaneously disrupted municipal websites in Dresden and Nürnberg. Separately, the local university hospital preemptively disconnected from the internet following an attempted cyber intrusion, maintaining this security measure for multiple days—though no data compromise, encryption, or ransom demands occurred during this unrelated incident. Both events reflect broader trends of German public institutions facing disruptive cyber operations.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 2 motives | 1 technique |
| Threat Actors | Type | Location |
|---|---|---|
| 0 actors | Available to members | Available to members |
Description
On October 12, 2023, the City of Frankfurt am Main's website became inoperable for several hours following a coordinated distributed denial-of-service (DDoS) attack. A city spokesperson confirmed the incident on October 13, attributing the disruption to malicious actors flooding servers with excessive traffic requests to induce system overload. The attack methodology followed typical DDoS patterns, utilizing geographically dispersed systems to generate overwhelming volumes of artificial traffic rather than attempting to breach internal IT infrastructure or exfiltrate data. Concurrently, multiple German municipalities including Dresden and Nürnberg experienced similar disruptions to their web services on October 12, though the technical coordination between these incidents remained unspecified in official communications. Municipal IT teams responded by working to filter malicious traffic and restore normal service operations within the same business day, though the precise mitigation techniques employed were not disclosed. No secondary impacts on municipal operations beyond website accessibility were reported, consistent with the superficial nature of most DDoS incidents targeting public-facing web assets rather than critical backend systems.
One week prior to this municipal attack, Frankfurt University Hospital (Universitätsklinikum Frankfurt) proactively disconnected from the internet on approximately October 5, 2023, following attempted unauthorized access by threat actors. This defensive isolation remained active through October 13 as forensic investigations continued, though hospital representatives confirmed no evidence of data encryption, exfiltration, or ransomware demands during the incident. The precautionary network segmentation reflected standard incident response protocols for healthcare institutions, which face elevated targeting due to the critical nature of medical services and sensitive patient data. While the hospital attack methodology differed fundamentally from the subsequent municipal DDoS incidents—potentially involving intrusion attempts rather than service disruption—both events underscored Frankfurt's recurring exposure to cyber threats across public sector entities. Neither incident revealed attacker identities or motives through publicly available information as of the reporting period.