UP_KURZL0G Credit Card Database Leak Exposes 11,476 Records

A file marketed as "CreditCards NEW DATABASE SPAM FRESH UNRAPPED UP_KURZL0G" landed on Telegram on 24-Oct-2025. Despite the flashy name, what HEROIC's analysts confirmed inside was 11,476 records of email addresses and plaintext passwords, paired with URLs, the kind of data stealer malware collects from infected browsers rather than a card processor's vault.

Why This Is Dangerous

Sellers on Telegram often dress up ordinary stealer logs with exciting names like "credit cards" or "fresh" to attract buyers, even when the actual contents are login credentials. That doesn't make it any less dangerous though, 11,476 sets of email and password combinations is still a large amount of leverage for fraud, account takeover, and phishing campaigns.

What Was Exposed

• 11,476 total records
• Email Addresses
• Plaintext Passwords
• URLs tied to the accounts

Why This Matters

Whatever the file was labeled, the real risk comes from the plaintext passwords sitting next to real email addresses. Attackers dont need to crack anything, they can just try each pair directly against email providers, shopping sites, and financial portals. If someone reused a password from one of these accounts on their actual banking site, the consequences could easily escalate beyond a simple email compromise.

How Stealer Logs Work

This type of dump usually begins with malware quietly infecting a device through a cracked download or malicious attachment. Once inside, it copies saved browser credentials, cookies, and autofill data, then ships everything back to the attacker automatically. From there, the data gets repackaged, sometimes with an eye-catching label like this one, and sold or given away in bulk on Telegram channels.

Check If You Are Affected

Dont let a flashy file name distract from the real risk hiding inside it. HEROIC's free breach scanner searches over 400 billion leaked records, so you can check your email address seperately and see imediately if your credentials were part of this leak.