Brinztech Alert: The Alleged Database of Eldorado.ua is Leaked

Dark Web News Analysis

The dark web news reports a significant data breach involving Eldorado.ua, a major Ukrainian consumer-focused company. A threat actor on a hacker forum is claiming to have leaked the organization’s customer database.

The compromised dataset is particularly concerning due to its focus on communication logs. It reportedly includes Phone Numbers and detailed Message Logs related to Viber and SMS communications. This suggests the breach may have targeted a Customer Relationship Management (CRM) system or a third-party messaging gateway used by the company for marketing and order notifications.

Key Cybersecurity Insights

Breaches involving message logs (Viber/SMS) are “Tier 1” social engineering threats because they reveal the context of the company’s relationship with the customer:

• The “Smishing” (SMS Phishing) Vector: The exposure of Viber and SMS details is the critical risk here. Attackers can view exactly what messages the company sent to the customer (e.g., “Your order is ready,” or “Your bonus balance is 500 UAH”). They can then craft a malicious message that mimics this format perfectly: “Your bonus points from Eldorado are expiring. Click here to redeem.”
• Channel Trust Exploitation: In Ukraine, Viber is a dominant communication channel for businesses. Customers are conditioned to trust messages appearing in their “Business” inbox. If attackers can spoof this channel or use the leaked phone numbers to send messages that reference real past interactions, the success rate of fraud skyrockets.
• Geopolitical Targeting: The focus on a Ukrainian entity highlights the ongoing “hybrid warfare” landscape. While this may be a financially motivated crime, the disruption of major consumer services often serves a dual purpose of destabilizing civilian trust in digital infrastructure.
• Identity Association: A valid phone number linked to a specific brand preference allows attackers to build a more complete profile of the victim, which can be sold to marketing spammers or used in broader identity theft schemes.

Mitigation Strategies

To protect customer privacy and communication integrity, the following strategies are recommended:

• Customer Advisory: Eldorado.ua should immediately inform customers via their official website and app that their message history may have been exposed, warning them to ignore any urgent requests for payment or “bonus redemption” sent via Viber/SMS.
• Gateway Audit: The IT team must investigate the API connections with their SMS/Viber service providers. It is possible an API key was compromised, allowing the attacker to scrape the message logs.
• Verified Sender IDs: Ensure that official communications use a “Verified Sender” ID on Viber and that customers are educated on how to distinguish a verified business account from a standard user account.
• 2FA vigilance: Customers should be reminded that Eldorado.ua (and legitimate banks) will never ask for a 2FA code via text message.

Secure Your Business with Brinztech — Global Cybersecurity Solutions

Brinztech protects organizations worldwide from evolving cyber threats. Whether you’re a startup or a global enterprise, our expert solutions keep your digital assets safe and your operations running smoothly.

Questions or Feedback?

For expert advice, use our ‘Ask an Analyst’ feature. Brinztech does not warrant the validity of external claims. For general inquiries or to report this post, please email us: contact@brinztech.com