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Hacker Leaks 2.3TB of Sensitive Data from Italian Rail Company Almaviva



A cyber attack has exposed 2.3TB of sensitive data from Italy's national railway operator, FS Italiane Group, through its IT services provider, Almaviva. The leaked data includes confidential documents and company information, prompting an investigation into the incident.

  • The Italian national railway operator FS Italiane Group was exposed due to a breach of its IT services provider Almaviva.
  • A total of 2.3 terabytes of data, including confidential documents and sensitive company information, were stolen and leaked on a dark web forum.
  • The breach highlights the vulnerability of large organizations to cyber threats, particularly those operating globally.
  • Almaviva is a significant player in the IT services sector, making it an attractive target for hackers.
  • The leaked data includes internal shares, technical documentation, contracts with public entities, and HR archives from several FS Group companies.
  • A breach investigation is underway, with Almaviva promising to provide transparent updates as more information emerges.
  • The incident emphasizes the need for robust cybersecurity measures to protect large organizations against cyber threats.



  • Italy's national railway operator, FS Italiane Group, has been exposed after a threat actor breached the organization's IT services provider, Almaviva. The breach resulted in the theft of 2.3 terabytes of data, which was then leaked on a dark web forum. According to the threat actor's description, the leak includes confidential documents and sensitive company information.

    The incident highlights the vulnerability of large organizations, particularly those that operate globally, to cyber threats. Almaviva is a significant player in the IT services sector, providing services such as software design and development, system integration, IT consulting, and customer relationship management (CRM) products. The company's size and reach make it an attractive target for hackers.

    In this article, we will delve into the details of the breach and explore its implications on Almaviva and FS Italiane Group. We will also examine the measures that can be taken to prevent similar breaches in the future.

    According to Andrea Draghetti, Head of Cyber Threat Intelligence at D3Lab, the leaked data is recent, and includes documents from the third quarter of 2025. The expert has ruled out the possibility that the files were recycled from a Hive ransomware attack in 2022. Instead, the structure of the dump, organized into compressed archives by department/company, is consistent with the modus operandi of ransomware groups and data brokers active in 2024–2025.

    The leaked data includes internal shares, multi-company repositories, technical documentation, contracts with public entities, HR archives, accounting data, and even complete datasets from several FS Group companies. The fact that sensitive information was compromised raises concerns about the potential impact on Almaviva's clients and customers.

    The breach has prompted an investigation into the incident, with help and guidance from government agencies. Almaviva has confirmed the breach via a statement to local media, stating that it activated security and counter-response procedures through its specialized team for this type of incident, ensuring the protection and full operability of critical services.

    In light of the breach, Almaviva has promised to transparently provide updates as more information emerges from the investigation. The company's prompt response highlights the importance of incident management in mitigating the impact of a data breach.

    Currently, it is unclear if passenger information is present in the data leak or if the data breach is impacting other clients beyond FS. BleepingComputer has contacted Almaviva with additional questions, but we have not received a response by publication time.

    The incident serves as a reminder of the need for robust cybersecurity measures to protect large organizations against cyber threats. As the threat landscape continues to evolve, it is essential that companies prioritize security and implement effective incident response strategies.

    In this article, we will explore the implications of the breach on Almaviva and FS Italiane Group, and discuss the measures that can be taken to prevent similar breaches in the future.



    Related Information:
  • https://www.ethicalhackingnews.com/articles/Hacker-Leaks-23TB-of-Sensitive-Data-from-Italian-Rail-Company-Almaviva-ehn.shtml

  • https://www.bleepingcomputer.com/news/security/hacker-claims-to-steal-23tb-data-from-italian-rail-group-almavia/


  • Published: Thu Nov 20 12:58:50 2025 by llama3.2 3B Q4_K_M













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