Brinztech Alert: Database of Altitude Infra (French Fiber Giant) is on Sale ($2k)

Dark Web News Analysis

A threat actor on a known cybercrime forum is advertising the alleged sale of a substantial database belonging to Altitude Infra. The dataset is approximately 5.76 GB in size, consisting of 52 files and 2 folders, and is being offered for a price of 2k (likely USD or EUR). The listing mentions an automated “bot” for access, suggesting a structured, high-volume sales operation.

Brinztech Analysis: This claim represents a critical infrastructure breach affecting France’s telecommunications backbone.

• The Target: Altitude Infra is one of France’s leading independent fiber infrastructure operators. It specializes in Public Initiative Networks (RIPs), deploying and managing fiber optics for local authorities across 28 networks and covering over 3 million homes.
• The Context: This incident appears to be part of a coordinated campaign against French digital infrastructure. It comes just days after the reported breach of Eurofiber France (Nov 24, 2025), another major B2B fiber provider. The timing suggests threat actors are systematically targeting the physical layer of the French internet.
• The Data: A 5.76 GB leak is significant. Given Altitude Infra’s business model, this likely contains Network Documentation (GIS maps, optical node locations), B2B Contracts with commercial ISPs (OCENs), or Eligibility Databases containing the addresses of millions of French residents.

Key Cybersecurity Insights

This alleged data breach presents a critical threat to national infrastructure and the ISP supply chain:

• Critical Infrastructure Exposure: Altitude Infra manages the physical fiber lines that keep rural and semi-urban France connected. If the leaked files include network topologies or access codes for NROs (Optical Connection Nodes), it poses a risk of physical sabotage or targeted service disruption.
• Supply Chain Risk (ISPs): Commercial operators (like Orange, Free, Bouygues, SFR) rely on Altitude’s infrastructure to reach customers in RIP areas. A breach here could expose the service details of their customers, creating a cascading privacy failure.
• Automated Monetization: The use of a “bot” and a relatively low price (“2k”) for a 5GB infrastructure leak suggests the threat actor prioritizes speed over extortion. This increases the likelihood that the data will be sold to multiple parties rapidly, including state-sponsored actors interested in mapping critical infrastructure.
• Regulatory Impact (GDPR/NIS2): As a critical infrastructure operator, Altitude Infra falls under the EU’s NIS2 Directive and GDPR. A breach of this scale requires immediate notification to ANSSI (National Cybersecurity Agency of France) and the CNIL.

Mitigation Strategies

In response to this claim, Altitude Infra and its partner ISPs must take immediate action:

• Activate Incident Response & Forensics: Immediately trigger the incident response plan. The file count (52 files) suggests a specific directory exfiltration. Forensics must identify which server (engineering, CRM, or backup) was accessed.
• Physical Security Review: If the leak includes locations or access codes for technical sites (NRO/SRO), physical access codes must be changed immediately.
• Stakeholder Communication (ISPs & Local Authorities): Altitude Infra must notify the local government authorities (who own the networks) and the commercial ISPs that use them. Transparency is vital to manage the supply chain risk.
• Proactive Threat Hunting: Scan for any “web shells” or persistence mechanisms left by the attacker. Verify if the “bot” selling the data is linked to a known Initial Access Broker (IAB) to understand the initial entry vector.

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