We Found the Hotmail Fresh B4_Jx Stealer Log Circulating on Telegram

In April 2026, HEROIC's threat intelligence team identified the Hotmail Fresh B4_Jx stealer log circulating in a Telegram channel used for trading stolen credentials. The file contained 341 records, each one pairing an email address with a plaintext password and the URL of the website where the credentials were originally entered. Our analysts confirmed the data was harvested by info-stealer malware running on compromised devices, and the file had already been downloaded by multiple users before we catalogued it.

Why Plaintext Passwords With Website URLs Are a Ready-Made Attack Kit

Unlike breaches where passwords are hashed or encrypted, every credential in this file is stored in plaintext. There is no barrier between an attacker downloading the file and logging into victim accounts. The included URLs function like a roadmap, telling attackers exactly which websites to target for each set of credentials.

For the 341 people affected, this means their email accounts, online services, and potentially their financial accounts are all vulnerable. An attacker does not need to guess which services a victim uses. The stealer log already provides that information alongside working login credentials.

What Our Analysts Found in the Hotmail Fresh B4_Jx File

• Email Addresses: Complete email addresses serving as login identifiers across services
• Plaintext Passwords: Unprotected passwords captured in real time by malware
• URLs: Direct links to the login pages where these credentials were used

Why Exposed Email Credentials Cascade Into Broader Identity Theft

An email account is the single most valuable target in a credential breach. It functions as the password recovery hub for nearly every online service a person uses. Once an attacker gains access to an inbox, they can reset passwords on banking sites, e-commerce platforms, cloud storage, and social networks without the account holder ever receiving a warning.

Credential stuffing compounds the problem. Automated tools test stolen email and password combinations against thousands of websites simultaneously. Studies consistently show that a majority of people reuse passwords across services. A single compromised email and password pair from this dump could unlock accounts the victim does not even associate with that password.

How Stealer Logs Are Created and Distributed

Stealer logs originate from info-stealer malware infections. The malware reaches devices through phishing emails, trojanized software downloads, and malicious ads that redirect to exploit kits. Once installed, it operates silently in the background, capturing credentials from browser password managers, recording keystrokes, and extracting session cookies.

The collected data is organized into structured log files, with each entry containing the website URL, the username or email, and the password. These files are uploaded to attacker-controlled servers and then distributed through underground marketplaces and Telegram channels. Many stealer log collections are shared freely as samples to attract buyers for larger, premium datasets.

Check Whether Your Data Appears in the Hotmail Fresh B4_Jx Breach

HEROIC monitors Telegram channels, dark web forums, and underground marketplaces to identify stolen credential dumps as quickly as possible. Our database now indexes over 400 billion compromised records. Use HEROIC's free breach scanner to check if your email address appears in this dump or any of the thousands of other breaches we track. If your credentials are found, update your passwords immediately, activate two-factor authentication on all critical accounts, and watch for unusual login attempts.