What Is a Stealer Log? mMIXED2 Leak Exposes 16,751 Records

HEROIC analysts discovered a stealer log file labeled "mMIXED2" that was uploaded by a Telegram user on April 17, 2026. This substantial dataset contains 16,751 records, each including email addresses, plaintext passwords, and URLs collected from infected devices across the United States.

Why 16,751 Plaintext Passwords Are a Serious Threat

Every record in this stealer log contains a password in plaintext, meaning attackers can use it immediately without any decryption. With 16,751 sets of working credentials, cybercriminals can launch large-scale automated attacks against email providers, online retailers, financial services, and social media platforms. The included URLs reveal exactly which accounts to target first.

What Was Exposed in the mMIXED2 Leak

• Email addresses from multiple service providers
• Plaintext passwords ready for immediate misuse
• URLs identifying the specific websites and services victims accessed

Why This Matters for Your Online Security

Credential stuffing and account takeover attacks depend on datasets exactly like this one. Automated tools can test all 16,751 email and password pairs across popular platforms in a matter of minutes. If any of these credentials match an active account, the attacker gains instant access. From there, they can steal personal data, make fraudulent purchases, or lock the real owner out entirely.

How Stealer Logs Work: A Growing Cybersecurity Threat

Stealer logs represent one of the fastest-growing categories of data theft. Unlike traditional data breaches that target a company's servers, stealer log malware infects individual devices. It runs silently in the background, capturing every password saved in your web browsers, email clients, and other applications. The malware also records which websites you visit, creating a complete map of your digital life. Attackers package this information into log files and distribute them through underground channels like Telegram, where thousands of new logs appear every day.

Check If You Are Affected by This Breach

HEROIC has indexed over 400 billion records from data breaches, stealer logs, and dark web leaks. Use HEROIC's free breach scanner to determine whether your email address or credentials appear in the mMIXED2 dataset or any other known compromise.