Mix Fresh B4_Jx Put 4,935 Plaintext Passwords on the Dark Web

HEROIC analysts identified a large stealer log breach labeled "Mix Fresh B4_Jx uploaded by a Telegram User" that surfaced on May 17, 2026. The dataset contains 4,935 records, each exposing email addresses, plaintext passwords, and the URLs where those credentials were used. Shared through a Telegram channel, this sizable dump provides cybercriminals with nearly 5,000 ready-to-use login combinations spanning multiple online services.

Why 4,935 Plaintext Passwords on the Dark Web Are Dangerous

Plaintext passwords require no cracking or decryption. Every one of the 4,935 credentials in this dump can be tested against live accounts within seconds. Because the leak also includes the URLs tied to each password, attackers know exactly which websites, banking portals, email services, and subscription platforms to target. At this scale, even a small percentage of reused passwords translates into hundreds of successfully compromised accounts across unrelated services.

What Was Exposed in the Mix Fresh B4_Jx Dump

• Email Addresses: Nearly 5,000 email accounts that function as login credentials and personal identifiers across countless online platforms.
• Plaintext Passwords: Fully readable, unencrypted passwords that attackers can use immediately without any processing.
• URLs: The specific websites and services associated with each credential pair, mapping out victims' online activity and account locations.

Why a Dump of This Size Amplifies the Threat

Larger credential dumps attract more attention from organized cybercrime groups because they offer better odds of finding working logins. With 4,935 records, attackers can run automated credential stuffing campaigns across major platforms and expect significant returns. The data also feeds identity theft operations: email addresses combined with known passwords help criminals build profiles, answer security questions, and gain access to financial accounts. When a dump reaches this volume, it frequently gets repackaged and redistributed across multiple dark web forums, extending its shelf life and reach.

How Stealer Logs Fuel Dark Web Credential Markets

Stealer log malware, known as infostealers, infects personal computers and quietly harvests saved browser passwords, autofill data, and session cookies. The collected data is compiled into structured log files that record every credential the victim has saved. These logs are then uploaded to Telegram channels, dark web marketplaces, and private forums where they are sold or shared freely. Mixed-service dumps like Mix Fresh B4_Jx are especially valuable because they contain credentials from a wide variety of websites, giving buyers access to diverse account types from a single purchase.

Check If Your Credentials Appear in This Dump

With nearly 5,000 records in circulation, the odds of exposure are meaningful. HEROIC's free breach scanner searches more than 400 billion compromised records, including stealer log datasets like Mix Fresh B4_Jx. A quick scan reveals whether your email or password has appeared in any known breach, so you can take action before an attacker does.