Inside the KURTXT_URL Stealer Log: How Malware Stole 13,276 Passwords

HEROIC analysts discovered a stealer log dataset uploaded to Telegram in July 2025 containing 13,276 records from U.S.-based endpoints. The file, identified as part of the KURTXT_URL USA ONLY ULP collection, exposed email addresses, plaintext passwords, and URLs harvested by malware running silently on infected machines. Unlike traditional database hacks, this data was siphoned directly from browsers and applications before any encryption had a chance to protect it.

Why This Is Dangerous for the 13,276 People Affected

When attackers have your plaintext password paired with your email and the exact URL where you used it, they do not need to guess or crack anything. They log straight in. With this kind of stealer log data, criminals can drain online banking accounts, hijack email inboxes to reset every other password you have, access employer portals and internal tools, and sell working credential sets to other threat actors within hours of the breach hitting the dark web.

Data Exposed in the KURTXT_URL Stealer Log Breach

• Email Addresses
• Plaintext Passwords
• URLs (the exact sites where credentials were captured)

How Criminals Use Stealer Log Data: Account Takeover, Credential Stuffing, and Fraud

Stealer log records are among the most actionable data on the dark web becuase they come pre-paired: one row contains your email, your password in readable form, and the website it belongs to. Attackers use this for direct account takeover with no brute-force required, credential stuffing attacks across banking and retail sites, identity theft by accessing personal documents stored in cloud services, and financial fraud through payment portals and saved card details. Because the passwords are already in plaintext, even strong passwords provide zero addditional protection once a stealer log is circulating.

What Is a Stealer Log and How Does Malware Harvest Your Passwords?

A stealer log is a file produced by a category of malware known as an infostealer. Programs like Raccoon Stealer, RedLine, and Vidar run silently on a victim's computer after arriving through phishing emails, fake software downloads, or malicious ads. Once installed, they extract saved passwords from browsers like Chrome and Firefox, copy session cookies so attackers can bypass two-factor authentication, record keystrokes, and bundle everything into a compact log file that is automaticly sent back to the attacker's server. The KURTXT_URL collection represents one such harvest targeting U.S. users, then uploaded to Telegram channels where buyers can purchase or download the logs for their own attacks.

Check If Your Data Was Exposed — HEROIC Free Breach Scanner

HEROIC's free breach scanner checks your email against more than 400 billion exposed records, including stealer log collections like this one. If your credentials appeared in the KURTXT_URL Telegram upload or any of the thousands of other breaches in our database, you will know immediately so you can change passwords and lock down accounts before attackers get there first. Run your free scan now at heroic.com — it takes less than 30 seconds.