Mix Fresh B4_Jx Leak: 474 Passwords, More Than a School’s Worth

In late May 2026, HEROIC analysts identified a stealer log dump called "Mix Fresh B4_Jx" uploaded to a Telegram channel by an anonymous user. The file contained 474 records tied to United States based accounts, roughly the number of students and staff at a small school, made up of email addresses, plaintext passwords, and the URLs of the sites those credentials were used on.

Why This Is Dangerous

Picture that entire school's worth of people having their login for some website sitting in a single file, readable by anyone who downloads it. Because the passwords are stored in plaintext and matched to the exact site each one unlocks, there is no cracking or guessing involved. An attacker can go straight from the file to a working login.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs of the associated login sites

Why This Matters

A group of 474 people is more than enough for attackers to run through automated credential stuffing tools, testing each email and password pair from this leak against other popular sites in case a password was reused. Anyone whose email account is compromised this way faces a higher risk of password resets on other services, identity theft, and financial fraud that reaches well beyond the original leak.

How Stealer Logs Work

Stealer logs are produced by infostealer malware, which infects a device through pirated downloads, cracked software, or malicious attachments, then quietly harvests saved usernames, passwords, and browsing URLs from the browser. These logs are typically shared on Telegram channels or dark web forums, exactly as this one was, giving criminals a batch of working credentials roughly the size of a small school community.

Check If You Are Affected

HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records, including this stealer log. Run a search today to see if you are one of the 474 people affected, and change any exposed passwords right away.