If You Reuse Passwords, the Hotmail.fr Leak Should Worry You

HEROIC uncovered a stealer log collection targeting Hotmail.fr users, uploaded to Telegram in February 2025, containing 55,365 compromised records. The data was extracted by infostealer malware from devices belonging to French-speaking Hotmail users, capturing their exact login credentials as they accessed websites and services online.

Plaintext Passwords Are an Open Invitation

The passwords in this Hotmail.fr dump are stored in complete plaintext. There is no encryption, hashing, or any form of protection. Every credential is immediately usable — an attacker who downloads this file can read your password just as easily as you can read this sentence. For Hotmail accounts, this grants direct access to your inbox, contacts, and any linked Microsoft services.

What Was Exposed

• Email Addresses — Hotmail.fr accounts that serve as primary identifiers across Microsoft and third-party platforms
• Plaintext Passwords — exact login passwords captured in readable form from infected devices
• URLs — the specific websites and services victims were accessing when credentials were stolen

Password Reuse Turns One Breach Into Total Exposure

If you have ever used your Hotmail.fr password on another website — a bank, a social network, a shopping site — then this single leak may have compromised all of those accounts. Attackers use credential stuffing tools to test every stolen pair against hundreds of popular services automatically. The more places you have reused a password, the wider the blast radius of this breach becomes for you personally.

How Stealer Malware Captured These Credentials

Infostealer malware is the engine behind this leak. These programs infiltrate devices through fake software, compromised browser extensions, and malicious email attachments. Once running, the malware silently monitors browser activity, extracts stored credentials from password managers built into browsers, and intercepts login forms in real time. The captured data — organized by email, password, and target URL — is compiled into log files and distributed across Telegram channels and dark web forums.

Check If Your Credentials Were Exposed

This Hotmail.fr credential dump is now fully indexed in the HEROIC data breach scanner. With over 400 billion records across thousands of breaches, HEROIC provides instant verification of whether your email or password has been compromised. Search your credentials today, change any exposed passwords across every service where you used them, and enable two-factor authentication to prevent unauthorized access.