Brinztech Alert: Alleged Database of K3G Solutions (Brazilian ISP) is on Sale ($120,000)

Dark Web News Analysis

A threat actor on a known cybercrime forum is advertising the sale of a massive data trove belonging to K3G Solutions, a Brazilian Internet Service Provider (ISP). The asking price is a substantial $120,000 (payable in XMR or BTC), reflecting the critical nature of the exposed data.

Brinztech Analysis:

• The Target: K3G Solutions is an ISP, making it a piece of critical telecommunications infrastructure. Breaching an ISP allows attackers to potentially monitor, redirect, or cut off internet access for thousands of downstream customers.
• The Data: The leak is technically exhaustive, covering the ISP’s entire operational stack:
  • Network Management: Huawei iManager U2000 backups and OSN9600 schemas (used for managing optical transport networks).
  • Hardware Configs: Configuration guides and backups for ZTE, Fiberhome, VSOL, and Raisecom OLTs (Optical Line Terminals), as well as VyOS BNGs and MikroTik routers.
  • Operational Intelligence: Internal handbooks, network maps, and backups of monitoring tools like Zabbix, Grafana, Graylog, and Netbox.
  • Business Data: Customer invoices, contracts, and technical team notes.
• The Price Tag ($120k): This high price indicates the seller believes the data allows for full persistence or competitive replication. It is not just a “data dump”; it is a blueprint for building (or destroying) the ISP.

Key Cybersecurity Insights

This alleged breach presents a catastrophic scenario for the ISP and its customers:

• Total Network Compromise: The exposure of Huawei iManager U2000 backups and OLT configurations provides the “keys to the kingdom.” Attackers can analyze these files to find hardcoded root passwords, SNMP community strings, or management IP addresses. This allows them to remotely hijack network devices, potentially shutting down internet service for entire regions.
• Traffic Interception & Man-in-the-Middle: With access to BNG (Broadband Network Gateway) and router configurations, sophisticated attackers could re-route traffic, perform DNS poisoning, or intercept unencrypted customer data streams at the ISP level.
• Strategic Intelligence for Competitors: The “Internal Handbooks” and network maps reveal K3G’s entire topology and business model. Competitors or malicious entities could use this to identify single points of failure or underbid K3G in new regions.
• Physical & Financial Risk: The leak of customer invoices and contracts exposes the personal data of Brazilian citizens (CPF, addresses), fueling identity theft and targeted phishing attacks disguised as “Overdue Internet Bill” notices.

Mitigation Strategies

In response to this high-severity claim, K3G Solutions must enter emergency incident response mode:

• Network Credential Reset (Critical): Assume every password, SNMP string, and API key in the network is compromised. K3G must rotate all administrative credentials for OLTs, BNGs, and the U2000 management system immediately.
• Isolation of Management Plane: Ensure that the management network (where U2000 and Zabbix reside) is strictly air-gapped or accessible only via highly secure, MFA-protected VPNs. Block all external access to management ports.
• Forensic Audit of Network Devices: Scan network devices (MikroTik, Huawei) for unauthorized “implants” or configuration changes (e.g., mysterious GRE tunnels or port mirroring rules) that attackers may have left for persistence.
• Customer Notification: Proactively notify customers about the potential exposure of their billing data. Warn them to ignore suspicious emails or calls claiming to be K3G support asking for payments or passwords.

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