Cyber Incident Victim: Holtzbrinck Buchverlage
Date:
Jun 2023
Location:
Germany
Summary
A cyberattack targeted an IT service provider for Holtzbrinck Buchverlage, disrupting its operations. The company preemptively severed all external connections to contain the incident and initiated system-wide checks. While no data, including that of customers or partners, is believed to have been exfiltrated, the event caused significant delivery delays and outages. Full restoration of services is underway, though the disrupted state was expected to persist for several more days, impacting the supply chain to bookstores.
| CIA Posture | Motives | Tactics, Techniques & Procedures |
|---|---|---|
| Available to members | 1 motive | 1 technique |
| Threat Actors | Type | Location |
|---|---|---|
| 0 actors | Available to members | Available to members |
Description
On June 15, 2023, an IT service provider for Holtzbrinck Buchverlage was subjected to a cyber attack. The attack was discovered on the evening of Friday, June 16, 2023, indicating the incident likely commenced on or just before that date. Upon discovery of the attack, a precautionary containment measure was immediately implemented whereby all external connections were severed. This action was taken to isolate the affected systems and prevent any potential further unauthorized access or egress of data from the compromised environment. The decision to cut all external links was a primary response action aimed at containing the incident's scope from the outset.
Following the isolation of the systems, a comprehensive review and investigation of all systems was initiated. The objective of this process was to determine the extent of the compromise, identify the point of entry, and assess the impact on both operational infrastructure and data security. The forensic examination focused on understanding the attacker's actions and the potential for data exfiltration. Based on the findings from this initial investigation, Holtzbrinck Buchverlage concluded that no data had been transferred externally. This assessment specifically confirmed that no customer or business partner data had been exfiltrated or left the internal network as a result of the security breach.
The primary and most immediate consequence of the incident and the subsequent containment actions was a significant disruption to the company's logistics and supply chain operations. The attack directly impacted the core systems responsible for managing the distribution and delivery of books. This resulted in widespread delays and partial outages in the ability to ship products to customers. The inability to process and fulfill orders in a normal manner created a bottleneck, preventing the timely delivery of books to the retail book trade partners that rely on Holtzbrinck's distribution services.
In response to the operational disruption, Holtzbrinck Buchverlage and its affected service providers dedicated all available resources to restoring full service functionality. Teams worked at a high intensity to repair the damaged systems and reinstate the services and IT services necessary for normal business operations. The central goal of this recovery effort was to return to a state where partners in the book trade could be supplied as usual and without further delay. The company acknowledged that the disrupted state was expected to persist for several additional days beyond the initial announcement as the restoration work continued. A communication plan was established to keep customers informed, with a commitment to provide immediate updates as soon as new information on the recovery progress became available. The incident caused a tangible impact on the German book trade sector due to Holtzbrinck's significant market presence, which includes numerous well-known publishing imprints, though the specific names of the imprints were not detailed in the provided report. The business impact was confined to operational delivery delays, with no financial or data breach implications reported based on the available information.