Mixed EU Combos 133K: European Credentials Stealer

In March 2025, a stealer log labeled "valid mixed combo mixed eu" exposed 133,176 email-password combinations targeting primarily European users. This dataset represents a significant aggregation of credentials from multiple sources combined into a single marketplace-ready file.

Why This is Dangerous

European users face compounded risk because this dataset likely includes accounts subject to GDPR protections and other regional regulations. Attackers targeting this geographic market often specialize in regional fraud, using local banking details and payment methods. A breach of 133,000 EU accounts creates massive liability for affected organizations.

What Was Exposed

• 133,176 Email Addresses (European accounts)
• Plaintext Passwords
• API URLs and Endpoint Data

Why This Matters

Mixed combo datasets are intentionally diverse, pulling from multiple sources to maximize their utility. A criminal with this list can target users across different countries, services, and account types. The European focus suggests this was specifically curated for Eastern European cybercrime operations.

How Combo Lists Get Created

Attackers merge stealer logs from multiple malware campaigns into single files. They remove obvious duplicates but maintain diversity across email providers, regions, and account types. These mixed combos are then sold to credential-stuffing operations that test them against hundreds of online services.

Check If Affected

If you're in Europe and have an email address, assume you're in at least one stealer log. Check this specific dataset and change your credentials if compromised. Enable two-factor authentication on all important accounts to prevent credential-stuffing attacks.