Brinztech Alert: Data of PT Infrastruktur Bisnis Sejahtera are Leaked

Dark Web News Analysis

A threat actor on a known cybercrime forum is claiming to have leaked a database that they allege originates from PT Infrastruktur Bisnis Sejahtera (IBS), an Indonesian company specializing in multi-operator systems and network solutions. According to the post, the compromised data appears to be a large employee database (e_karyawan), with one part of the leak alone containing over 232,000 records. The purportedly exposed information includes sensitive employee PII such as names, contact details (phone numbers and emails), job titles, and potentially bank account information.

This claim, if true, represents a critical supply chain security incident. While the data itself is of IBS employees, the primary risk extends to the more than 200 premium building clients that rely on IBS for network solutions. Criminals can use the leaked employee data to orchestrate highly convincing spear-phishing and social engineering attacks, impersonating legitimate IBS staff to gain access to the networks of their clients. The breach also poses a direct threat of identity theft and financial fraud to the IBS employees themselves.

Key Cybersecurity Insights

This alleged data breach presents a critical and widespread supply chain threat:

• Severe Supply Chain Risk for Clients: The most significant danger is the potential for follow-on attacks against IBS’s clients. Threat actors can use the names and job titles of real IBS network engineers and technicians to craft highly credible phishing emails or pretexting calls to trick client employees into granting network access or revealing credentials.
• High Risk of Employee Identity Theft: The alleged exposure of a comprehensive employee database, especially if it includes financial details, puts the staff of IBS at high risk of identity theft, targeted phishing, and financial fraud.
• A Foothold for Deeper Intrusion: An employee list provides attackers with a roadmap of the organization. They can use it to identify and target high-privilege employees, such as system administrators, in an effort to escalate their own access and gain deeper control over IBS’s core infrastructure and client-managed systems.

Mitigation Strategies

In response to a supply chain threat of this nature, both IBS and its clients must take immediate action:

• Launch an Immediate Investigation and Notify Partners: IBS’s highest priority must be to conduct an urgent forensic investigation to verify the claim’s authenticity. It is also their critical responsibility to proactively and transparently notify all of their clients about the potential breach so those organizations can take defensive measures.
• Mandate a Full Credential and Security Overhaul: IBS must enforce an immediate, mandatory password reset for all employees on all internal and client-facing systems. Implementing Multi-Factor Authentication (MFA) is an essential control to prevent attackers from using any compromised employee credentials. ¹   Memo 22-09 multifactor authentication requirements overview – Microsoft Entra learn.microsoft.com
• Activate Third-Party Risk Management for all Clients: Any company that uses IBS as a network provider should immediately activate its third-party risk management and incident response plans. They must treat all communications purporting to be from IBS with heightened scrutiny and provide their own staff with awareness training on the risk of phishing attacks impersonating their vendor.

Secure Your Organization with Brinztech As a cybersecurity provider, we can protect your business from the threats discussed here. Contact us to learn more about our services.

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