Check Now: Xavier_Ulp Breach Exposed 296,010 Passwords

HEROIC analysts discovered a stealer log file uploaded to Telegram in March 2026, part of the Xavier_Ulp series, containing 296,010 records. Each entry pairs an email address and a plaintext password with the exact login URL it belongs to, all pulled directly from infected devices rather then a single breached company. Before reading further, it is worth checking whether your own email is part of this exposure.

Why This Is Dangerous

Nearly 300,000 passwords sitting in plain text is about as dangerous as leaked data gets. There is no encryption standing between an attacker and your account. They open the file, find a match, and log in immediately, no cracking tools or technical skill required.

What Was Exposed

• Email addresses
• Plaintext passwords
• Login URLs tied to each account

Why This Matters

A file of this scale is a prime resource for credential stuffing attacks, where criminals run stolen logins against dozens of popular sites at once. Since password reuse is so common, a single leaked credential often unlocks multiple accounts, leading directly to account takeover, identity theft, and financial fraud.

How Stealer Logs Work

Stealer logs come from infostealer malware that infects a device through pirated downloads, fake installers, or malicious links, then quietly harvests every saved password and autofill entry in the browser. The results get packaged into a file and distributed on Telegram or dark web forums, which is exactly how this 296,010-record file reached the public.

Check If You Are Affected

Do not wait to find out the hard way. Head to HEROIC's free breach scanner and check your email against a database of over 400 billion leaked records, including stealer logs exactly like this one. It takes seconds, and it could save your accounts.