U.S. Users Targeted: Redline Cl0ud4 39K Mix Exposes 37,833 Passwords

HEROIC uncovered a stealer log dataset labeled Redline Cl0ud4 39K Mix being distributed on Telegram in July 2026. The dump contains 37,833 validated credential records captured by RedLine infostealer malware, with a notable concentration of U.S.-based victims. All passwords are stored in plaintext and have been flagged as validated, indicating they have been confirmed to work on live services.

Validated Plaintext Passwords: Already Confirmed Working

The credentials in this dump represent a double threat. Not only are all passwords stored in their original, unencrypted plaintext form, but the "valid" designation means threat actors have already verified these login combinations against real services. This removes all guesswork for attackers and puts every affected account in immediate jeopardy.

What Was Exposed

• Email Addresses — identifying U.S. and international users across thousands of services
• Plaintext Passwords — pre-validated and immediately exploitable without decryption
• URLs — revealing the full list of compromised websites, services, and login portals

The Expanding Reach of Credential Stuffing

With nearly 38,000 validated credential pairs, attackers can mount large-scale credential stuffing campaigns targeting every major online service. Automated tools blast these email-password combinations across financial institutions, government portals, healthcare systems, and enterprise applications. The validated nature of these credentials means higher success rates than typical dumps, leading to rapid, widespread account compromise.

How RedLine Stealer Captured This Data

RedLine infostealer infiltrates systems through a variety of vectors: phishing emails with malicious attachments, fake software downloads, compromised browser extensions, and malvertising campaigns. Once running, the malware targets every major browser to extract saved passwords, harvest active session cookies, collect autofill data, and steal cryptocurrency wallet information. The stolen data is transmitted to command infrastructure and packaged into structured log files for mass distribution through underground Telegram channels.

Check If Your Credentials Were Exposed

Validated credentials are among the most actively exploited data in the cybercriminal ecosystem. HEROIC indexes more than 400 billion compromised records from breaches and stealer logs worldwide. Search your email address or domain using HEROIC's breach scanner to find out if your credentials appear in this or any other known data exposure, and update your passwords immediately if a match is detected.