Brinztech Alert: 1win (Betting Site) 28GB SQL DB (96M Users + Partners/Employees) Leaked; High Risk of BEC & Supply-Chain Attacks

Dark Web News Analysis

The dark web news reports the sale of a 28GB SQL database from the online betting site 1win (aka 1winbet). This post is a re-advertisement of a catastrophic, confirmed data breach from November 2024 that impacted over 96 million users. The database is now being re-sold or circulated.

Key details of the breach:

• Source: 1win (Online betting/casino, based in Nicosia, Cyprus).
• Data Size: 28GB SQL file.
• Data Content (CRITICAL):
  • User Data (~96M): Full PII (Names, Emails, Mobile Phone Numbers, Dates of Birth) and Hashed Passwords (reportedly unsalted SHA-256, which is weak).
  • Internal Data: “Firm partners and employees” information. This includes the affiliate/partner database and potentially internal admin/employee credentials.

This is a “worst-of-both-worlds” breach: it provides a “goldmine” for mass credential stuffing against users and the internal data for hyper-targeted corporate attacks.

Key Cybersecurity Insights

This is a security incident of the highest severity with two distinct, critical threat vectors:

1. CRITICAL B2B/Supply-Chain Risk (The “Partner/Employee” Data): This is the most dangerous, high-impact part of the leak. Attackers will use this data to:
   • Launch Hyper-Targeted Spear-Phishing/BEC: Send perfectly crafted emails (in any language) to 1win employees, C-level execs, and partners.
   • Scam Example (Partner): “Hello [Payment Processor Name], this is [1win Employee Name], your partner manager. We are updating our payout accounts. Please send this month’s revenue share to this new BTC address…”
   • Scam Example (Internal): “Hello [Employee Name], this is IT. Due to the breach, we are migrating systems. Please log in to the new portal [phishing link] to verify your identity.”
   • This provides a direct, trusted vector to compromise 1win’s entire financial and operational ecosystem.
2. CRITICAL B2C Risk (The “User” Data):
   • Massive Credential Stuffing: This is the #1 threat to the 96M users. Attackers are at this moment using the (email + cracked password) combos to attack high-value sites (banks, email, other crypto/betting sites) where users have reused their password.
   • Targeted Phishing: Attackers can send convincing scams (e.g., “Your 1win account has a withdrawal pending…”) to steal more credentials or money.
3. Catastrophic GDPR Breach (Cyprus): As 1win is based in Cyprus (an EU member), this is a massive violation of the General Data Protection Regulation (GDPR). The scale (96M users), sensitivity (PII + passwords), and nature of the breach (reportedly an unauthenticated, exposed database) will attract fines of up to 4% of their global turnover.

Mitigation Strategies

This is an ongoing crisis. The data is public. Mitigation must focus on containing the fallout.

1. For 1win (The Company):
   • MANDATORY: Enforce MFA: Immediately enforce phishing-resistant Multi-Factor Authentication (MFA) for all employees, admins, and partners. This is the only effective defense against the spear-phishing risk.
   • CRITICAL: Partner/Employee Counter-Intel: Urgently and repeatedly warn all employees and partners (payment processors, game suppliers, etc.) to be on HIGH ALERT for BEC and phishing. All requests for payment changes, wire transfers, or credentials must be verified via an out-of-band (OOB) channel (e.g., a direct phone call to a known number).
   • Ongoing User Mitigation: 1win (who reportedly already forced a password reset) must continue to warn users that their passwords are leaked and advise them to change reused passwords on other sites.
2. For 1win Users:
   • CRITICAL: Change Reused Passwords: If you ever used 1win, you must assume your password is public. If you reused that password anywhere else (email, bank, crypto exchange), go and change those passwords immediately.
   • Check HIBP: Check haveibeenpwned.com to confirm if your email was in the 96M records.
   • Phishing Vigilance: Trust no email claiming to be from 1win.

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Questions or Feedback? This analysis is based on threat intelligence from a dark web forum, which correlates with a widely reported 2024 breach. A leak containing both mass user data and internal partner/employee lists is a critical-severity event. Brinztech provides cybersecurity services worldwide and does not endorse or guarantee the accuracy of external claims. For any inquiries or to report this post, please email: contact@brinztech.com